I know why there isnt a gift system and why you cant have a market place, but what about sending credits/items to allies, as in within a guild or to peple on your allied friend list. Shouldnt this help players to actualy add friends to the game rather then buy Mercenaries for Sun Points, so that you have more players play the game that might spend money on it?
Isn't a way to gain more gamers for a particular FaceBook game handled by FB itself? They provide you with the "Like" option and thus gain popularity allover and next to that, have their own add system that suggests games to your friends and notifies them whenever you achieved a certain point/feature/goal?