A micro-payment service that was allowing in-app donations has been removed from one of its own patrons' apps, with Apple determining that the service, regardless of its good intentions, violates App Store rules. The service, Flattr, was trying to allow visitors to podcasts and websites to be able to "tip" the operators by simply clicking a Flattr button on the site they are visiting. Since it was a donation, Apple wouldn't collect its customary 30 percent.