If you regularly read the top marketers’ blogs, then you will no doubt have a collection of popups in your mind that ask you to join a mailing list right when you visit a site, or maybe even when you attempt to leave.
While these popups may seem annoying, they are usually only shown once to a visitor every 15 days or so. What does matter is that these types of popup calls-to-action work extremely well and are adding millions of email addresses to blog mailing lists every single day!
