I currently invest 50 dollars for some pre-marketing on a site over 30 days.
There is a rating system for users. You get more attention when you get more thumps up.

If you can spare a few seconds and give me a thumb up this would be nice.
So I may get profitable in the end and can continue riding the rainbow of happiness.

http://www.preapps.com/new-iphone-apps/sha-cat/1214