There is too much negativity. Forum is the place to ask such questions and save time doing research, it's called collective knowledge. Too do emailing you'll need: 1. Good data, which you can a.collect . b. buy c. revshare. Just contact businesses which you think have such data. 2. Platform. You could find a friendly ESP or Run your own system which consists of FrontEnd and BackEnd. Popular choice for newbies is IEM. Backend is more complicated problem and you'll need to do your own studying.
Negativity? I may agree on you on that one. But I don't let that get in the way. I just shrug it off.