Rovio is taking its success with mobile game Angry Birds — 50
million downloads and counting — and using it to launch a new
in-app purchase, carrier-billing payment system. The mobile
developer said it’s launching Bad Piggy Bank early next year
with Finnish carrier Elisa, allowing users to upgrade to an
ad-free version of Angry Birds or buy Angry Birds’ first virtual
good — the Mighty Eagle character — with one tap.