To help explain the scope and approaches used for digital marketing working with the IDM in 2005 I developed a more (too?) detailed definition than the simple one at the start of this post to better scope it and show how digital marketing needs to be closely aligned to broader marketing objectives and activities and involves much more than SEO and inbound marketing. So this is the original definition from 2005 - how should it change now?

I am loving this article. I specifically like points 1 and 7. As for number 1, I think a quality list is better than a gigantic list of just anyone like you say. I think this is also true for “followers” and “likes”. Are the people following you genuinely caring about your content or just subscribing just to apease you? As for #7, we have to KNOW if our efforts are working and not just go off of a gut feeling. Great points here Erik.
Consumers also face malware risks, i.e. malvertising, when interacting with online advertising. Cisco's 2013 Annual Security Report revealed that clicking on ads was 182 times more likely to install a virus on a user's computer than surfing the Internet for porn.[105][106] For example, in August 2014 Yahoo's advertising network reportedly saw cases of infection of a variant of Cryptolocker ransomware.[107]
As with offline advertising, industry participants have undertaken numerous efforts to self-regulate and develop industry standards or codes of conduct. Several United States advertising industry organizations jointly published Self-Regulatory Principles for Online Behavioral Advertising based on standards proposed by the FTC in 2009.[109] European ad associations published a similar document in 2011.[110] Primary tenets of both documents include consumer control of data transfer to third parties, data security, and consent for collection of certain health and financial data.[109]:2–4 Neither framework, however, penalizes violators of the codes of conduct.[111]

This ties into the second 40 of the 40/40/20 rule – now you’re probably beginning to see why that was listed up front and why it’s universally considered the gold standard when it comes to direct mail marketing guidelines. With other forms of advertisements or marketing, it is perfectly acceptable to only go after impressions – a billboard in a highly-trafficked area or a TV spot that is more of a teaser in nature can sometimes go a long way toward educating the public of your existence, which is the first step in getting them to engage. With direct mailings however, you might as well be printing cash to send out to people if you don’t have a compelling call to action to give people.
Besides the fact that email blasts can be spammy and impersonal, they’re also not the most effective way to make money. Although a large-scale email blast is sure to convert, it’s not because sending it was a strategic move — it’s because you cast a wide net. If you crafted a targeted newsletter instead, you’d see a better conversion rate and you’d be able to replicate the strategy many times over. Marissa Petteruti calls email blasts a wasted opportunity to generate more revenue, citing:
Ad blocking, or ad filtering, means the ads do not appear to the user because the user uses technology to screen out ads. Many browsers block unsolicited pop-up ads by default.[87] Other software programs or browser add-ons may also block the loading of ads, or block elements on a page with behaviors characteristic of ads (e.g. HTML autoplay of both audio and video). Approximately 9% of all online page views come from browsers with ad-blocking software installed,[88] and some publishers have 40%+ of their visitors using ad-blockers.[3]
Email Newsletters are some of the most common and popular forms of email marketing. Use email newsletters to provide your subscribers with timely, expected, and helpful updates from your brand. Include thought leadership or how-tos, announcements about your product or service, insider-peeks into your business, or any other engaging content that adds value to your subscribers’ inboxes.

Although there’s no panacea for direct mail’s attribution problem, Simpson says that he shores up his data by matching a list of recent buyers with consumers from the campaign’s direct mail list. This method is more inductive than deductive, in that he cannot be entirely sure the direct mail led to the purchase, but it allows him to have an idea of how effective a direct mail campaign has been. 
While perhaps not as splashy as other forms of marketing, direct mail marketing is one of the most cost-effective, minimally intrusive form of advertising. By using the proper research tools, companies can send their messages directly to specific demographics, targeting the most likely customers. Using creative strategies, direct mail companies can grab the attention of their ideal consumers and entice them to do purchase goods or services.
Every week, the folks at InVision send a roundup of their best blog content, their favorite design links from the week, and a new opportunity to win a free t-shirt. (Seriously. They give away a new design every week.) They also sometimes have fun survey questions where they crowdsource for their blog. This week's, for example, asked subscribers what they would do if the internet didn't exist.

Be aware from January the popup opt in is going to decimate your Google search rankings, so the evergreen welcome mat and overlay (which you’re using on this page on exit intent) are going to be things of the past (unless you want to lose your position in the SERPS…). Time to get rid of the popups now and move to content upgrades inline in your articles (which you do really well in this post!).
The most advanced email marketing services offer custom workflows where you can specify triggers based on actions (such as opening an email or making a purchase) or on inaction (such as ignoring emails). With these services, you can also set up a series of emails (such as tutorials) to be sent to segments of users, and you can pause or stop a campaign at any time. You can also move contacts into new segments once they have completed tutorials.
Consumers also face malware risks, i.e. malvertising, when interacting with online advertising. Cisco's 2013 Annual Security Report revealed that clicking on ads was 182 times more likely to install a virus on a user's computer than surfing the Internet for porn.[105][106] For example, in August 2014 Yahoo's advertising network reportedly saw cases of infection of a variant of Cryptolocker ransomware.[107]
Email marketing has been around for decades, but it is still one of the most effective digital marketing channels available when it’s done well. Email today needs to feel like one-on-one conversations with each audience member, but it also needs to scale. Make sure your strategies are up-to-date so your emails are getting delivered and cutting through the noise.
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