Marketers continue to use direct mail in 2016 because it still leads in ROI. However, traditional direct mail marketing has changed dramatically. InfoTrends did a study on direct mail that found the following statistics: 66% of direct mail is opened, 82% of direct mail is read for a minute or more, 56% of consumers who responded to direct mail went online or visited the physical store, 62% of consumers who responded to direct mail in the past three months made a purchase, and over 84% reported that personalization made them more likely to open a direct mail piece.
Alternatively, ad space may be offered for sale in a bidding market using an ad exchange and real-time bidding. This involves many parties interacting automatically in real time. In response to a request from the user's browser, the publisher content server sends the web page content to the user's browser over the Internet. The page does not yet contain ads, but contains links which cause the user's browser to connect to the publisher ad server to request that the spaces left for ads be filled in with ads. Information identifying the user, such as cookies and the page being viewed, is transmitted to the publisher ad server.
Most of the article really talks about how to successfully get an email of a person who has already landed on your landing page/podcast page/affiliate/blog etc. but how to get those people there in the first place is a bigger challenge. Also, one of the ways you can include in your list is by offering free tools/widgets. For example, OpenSiteExplorer by Moz is a great example. Evergreen and very useful for the target audience.

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]
“We’re always giving people the option to join our email list when they come into the spa, but we just recently added the option for people to sign up when they visit our website,” explains Christine Copertino, spa director for Allegria Spa. “The response has been great. We’re seeing a ton of people signing up, and we know that these are really engaged people who will be excited to receive our emails.”
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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