And better yet, mailing lists are highly stable. Google changes its algorithms all the time and let's face it, Facebook could go down mailing list tomorrow (though it's unlikely). E-mail though? That's highly unlikely to go anywhere any time soon. If you have an e-mail list with a few thousand addresses on it then you'll have a few thousand potential customers no matter what happens to the rest of the web.
This is very savvy futureproofing. It's actually perfectly possible to monetize a mailing list and thus to earn sales from your e-mails mailing list directly. In other words, if you get this right then you will hardly even need your website anymore! If that still hasn't done it, then just consider some of these impressive statistics that absolutely prove the potential power of mailing lists.
E-mail marketing has a ROI of 4,300% - Okay, so it's unclear how anyone would have calculated this but that's the most popular mailing list estimate. The point is: e-mail marketing is incredibly cheap and just as effective (if not more so) than many other more expensive means of marketing. 91% of consumers check their e-mail at least once a day.