Android Market rule prohibits use of third-party in-app payment services
arstechnica.com
arstechnica.com
Here's a copy of the Android developer agreement from 2008:
http://web.archive.org/web/20081219010834/http://www.android...
Take a look at the definition of "Payment Processor" and section 3.3. That's the same rule we're talking about today. The effort put into enforcement may have changed, but the rule itself hasn't.
The cynical side of me however thinks that this may have been Google's plan all along - get a big enough user base and then enforce the rule. It's a good way to recoup some money for the cost of developing the Android OS.
Edit: google has Google Adsense, which can send payments to pretty much anywhere in the world
Google Play Store. Windows Live Search, eh I mean Windows Live Search Center. Games For Windows? Surely you mean Games for Windows - Live. Or Xbox Marketplace?
Also Google Wallet is unavailable in many countries as others have noted.
Oh well, I was hoping that someone would give Apple a run for money.