Zynga might have simply bought the userbase. Divide the paid $200mil to the number of users OMGPOP had at that time and then compare it to the amount you expect

Zynga might have simply bought the userbase. Divide the paid $200mil to the number of users OMGPOP had at that time and then compare it to the amount you expect to gain per user once you have them consuming Zynga stuff. Of course, this thought is not always what actually happens, but Zynga might have been desperate already at the time for new distribution channels, that they agreed to pay a premium for that bundle of users.