In the platform wars between Facebook on the one side and MySpace, Google, and the whole OpenSocial crew on the other, the side that makes it easier for application developers to make the most money will win. Advertising in social networks has always been problematic, and with an advertising recession upon us those already-low ad rates are going to get lower, not higher. The other way to make money on these platforms is to try to charge for apps themselves or sell things through the apps. But to do that developers first need a payment and billing system to tap into.

Less than an hour ago, MySpace COO Amit Kapur revealed at the Web 2.0 Summit that MySpace is working on its own payments and virtual gift products that MySpace developers will be able to add to their own apps.