> First of all, don't buy data. It is never going to work as well. It is much better if you collect your leads in a genuine way and on your own site. So, basic

> First of all, don't buy data. It is never going to work as well. It is much better if you collect your leads in a genuine way and on your own site. So, basically, the advice here is "don't act like a spammer". Good advice, but I thought it's fsckin' obvious. The rest of the article is low-density garbage. Number one thing to keep people on your mailing list is to provide useful information through this list. And be humble: your product is rarely this useful information.