Facebook is no stranger to letting members use real money in web apps, but only for in-app purchases. Its new App Center on the web and in mobile versions will let you buy web apps that have an up-front cost to use rather than shoehorning you into a freemium or subscription model. The portal will even have its own shopping portal, although it'll mostly be based around -- surprise -- recommendations coming from your social network profile. The addition should, in theory, lead to premium games and other apps that
