The huge advantage of email over social media is that prospects and customers are more likely to see an email than social media. Just posting something doesn't mean that everyone you want to see your message will see it. Your post might not even show up in your targets' social media streams. However, an email will sit in the inbox until it's read (or deleted). 

Purchased lists are ineffective, and they impact everyone else who uses Mailchimp, too. If you send emails to a list of people whose contact info you bought, many of the emails will get identified as spam. Some spam filters will flag a campaign if anyone with the same IP has sent spam in the past. When you use Mailchimp, your email is delivered through our servers, so if one person sends spam, it could prevent other users’ emails from reaching inboxes. But by forbidding Mailchimp users from using purchased lists, we increase deliverability for everyone.

This article is informative, but it does not offer distinguishing features between the services covered (other than mailchimp is free). You seemed to go to great lengths to say good things about each – although I’m sure each services has positive aspects. I would have benefited much more from a rating of some sort of the various features of each service, or at least the pros & cons of each.
As digital marketing continues to grow and develop, brands take great advantage of using technology and the Internet as a successful way to communicate with its clients and allows them to increase the reach of who they can interact with and how they go about doing so,.[2] There are however disadvantages that are not commonly looked into due to how much a business relies on it. It is important for marketers to take into consideration both advantages and disadvantages of digital marketing when considering their marketing strategy and business goals.
It is increasingly advantageous for companies to use social media platforms to connect with their customers and create these dialogues and discussions. The potential reach of social media is indicated by the fact that in 2015, each month the Facebook app had more than 126 million average unique users and YouTube had over 97 million average unique users.[27]
By placing links back to Foundr’s website, it means that we’re able to piggyback on high-profile influencers and expose our brand to an already interested audience. Similar to how the content upgrades work, placing these backlinks throughout these guest articles encourages readers to click on them and get even more value with our much more in-depth article.
 2. Select recipients based on a list, tag, or saved filter. For example, you may add the subscribers of your weekly newsletter by adding all supporters with the tag “weekly newsletter.” Alternatively, you may choose “All” and select all supporters in your nation, or all prospects. Remember that it is good practice to segment your email list in order to increase your email deliverability.
The final part of the description summarises approaches to customer-centric emarketing. It shows how success online requires a planned approach to migrate existing customers to online channels and acquire new customers by selecting the appropriate mix of e-communications and traditional communications. Retention of online customers needs to be based on developing customer insight by researching their characteristics, behaviour, what they value, what keeps them loyal and then delivering tailored, relevant web and e-mail communications.
Due to the massive growth of the Internet, most countries have passed legislation to prevent companies from sending unsolicited emails. These laws determine what is and what is not considered acceptable email correspondence, and enforce restrictions on email communications. In the United States and Europe, for example, bulk email must contain an accurate from field and subject line, and the email content must include the sender’s physical address. In addition, a blast email must also offer its recipients the opportunity to unsubscribe from the email list — and such requests must be met within a specified period of time. As a result of these laws, it is very important for companies to maintain an updated list of subscriptions and cancellations at all times, and avoid sending out email that appears to be spam. https://mangools.com/blog/wp-content/uploads/2017/11/Case-study-Launching-a-new-product-email-campaign-960x510.png
If you sign up for something and the terms include words like "Sign up to receive updates from us and our partners that we think you'll like," your email address is likely being collected for a shared or sold list. A subset of this method is called co-registration. This is where you sign up at a website, but that website also automatically, or nearly automatically, signs you up for other sites. They try to legitimize this by informing you of the additional subscriptions, or providing boxes to uncheck. This is a situation where it's not the subscriber’s intention to sign up for the material they will be receiving.
Online advertising, also called online marketing or Internet advertising or web advertising, is a form of marketing and advertising which uses the Internet to deliver promotional marketing messages to consumers. Consumers view online advertising as an unwanted distraction with few benefits and have increasingly turned to ad blocking for a variety of reasons. When software is used to do the purchasing, it is known as programmatic advertising.
In the late 1990s online shoppers were mainly well-educated, high-earning, twenty- to forty-year-olds. By 2003 online shoppers represented a broader demographic, with an average age of forty-four years and an average annual household income of $65,000. Of these shoppers, 50 percent were female and 50 percent were college graduates. According to a 2004 report from the U.S. Department of Commerce, in 2003 searching for product/service information was the second most popular online activity after e-mailing or instant messaging and 77 percent of U.S. Internet users age fifteen and older shopped online. E-customers researched products and services that they were considering for purchase online. Their final purchases, however, may not have been made online.
The huge advantage of email over social media is that prospects and customers are more likely to see an email than social media. Just posting something doesn't mean that everyone you want to see your message will see it. Your post might not even show up in your targets' social media streams. However, an email will sit in the inbox until it's read (or deleted). 
Charities and non-profit groups also use direct mail marketing to fundraise. One common method for charities is to send free return address labels to potential donors—accompanied by a giving slip and return envelope. The March of Dimes has had phenomenal success with this method; representatives there have added that the secret to direct mail contributions is to contact people often. https://blogs.brighton.ac.uk/mk1marketing/files/2018/02/email_blasts_header_envelopes_computer-1sbxp11.png

If you create an email blast that asks your contacts to do something (like call you, fill out a form on your website, or take advantage of an offer), make sure you have that high up in the email.  A good rule of  thumb is that your call to action should appear right away, when someone opens your email. If someone has to scroll to find it, it’s in the wrong place. It’s the same philosophy as the old newspaper theory that the stories “above the fold” are those which get the most attention.

After you check the box, you'll choose a merge tag that corresponds with the list data you want to display in the "To" field. For example, if you choose *|FNAME|* , a recipient named Bob will see "To: Bob" instead of "To: bob@example.com." The default options are *|FNAME|* , *|LNAME|* , and *|FNAME|* *|LNAME|* , but you can click Custom to enter an alternate tag or text.
Couple your sign-up boxes with a clear description of “what’s in it for them.” Let customers know exactly what to expect when signing up, and sell the benefits for being on your email list. This can be as simple as promoting the general advantages of the channel — such as being able to receive information and offers faster and that it’s eco-friendly.

As opposed to static messaging, chat advertising refers to real time messages dropped to users on certain sites. This is done by the usage of live chat software or tracking applications installed within certain websites with the operating personnel behind the site often dropping adverts on the traffic surfing around the sites. In reality this is a subset of the email advertising but different because of its time window. http://www.digitalvidya.com/wp-content/uploads/2014/12/email-campaign.jpg
SXSW, Inc. – This lean organization organizes some of the most well-known events in the world, including the SXSW film, music and interactive festivals held every year in Austin, Texas. The goal of their marketing team is to increase ticket sales and attendees at these events, so they use email marketing to keep subscribers up to date as new artists and speakers join the lineup. 

Promotional emails are one of the most economical ways for any business to connect with customers. Research shows a message is five times more likely to be seen through email than on social media like Facebook or Twitter. That’s why musicians use email marketing software to share their performance schedule with their fans, non-profits use it to get donations and photographers use it to promote their portrait services. It just works.
Content marketing should be a familiar concept to most marketers these days. Nearly 90 percent of B2B marketers currently employ a content marketing strategy because they believe it is an effective mechanism for building a brand’s reputation, increasing brand awareness, driving new leads, and ultimately boosting your sales.  In fact, content marketing has become so MORE…
It's practically impossible to overstate the importance of direct mailing lists to the success of your direct mail program. The correct mailing list will contain your most valuable prospects. The more careful you are in analyzing and selecting direct mailing lists, the better your chances for success. There are several different categories of mailing lists available on the market today ranging in cost and appropriateness for your market. When you are considering what type of mailing list to buy consider the following three types:
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