I've been working on a large number of kickstarter campaigns over the last few years and I've managed to collect a huge amount of backer data. I started with my own campaigns and I've managed to grow my collection of backes to 100+ campaigns and 500,000+ backers.

I've seen websites like krowdster and backersdatabase make a lot of money selling this data but I have not really put it to good use yet...

I was wondering if anyone else does a similar thing? What are the most effective (and legal ways) to use this data?

Does anyone have any tips on how to grow their databases?