Yeah, I agree that it works for some MP games. Games like e.g. Smurfvillage sucks up your mula like a black hole if you start buying berries and stuff. Developers like Zynga are "money grabbing ladies of the night " and develop games like these that in essence force you to pay money for in game goodies if you don't want to wait a week to progress to the next needed level. They are masters at hooking you and getting you into a game only to bring you to a brick wall that you have to buy your way over.
That type of game development I have with a passion.



