I wanted the ability to use all of the Minis, so I gave myself a head start to get a full collection.It keeps the player base healthy and allows people to spend what they want for the experience they want. I like FTP games because it allows more people to have access to the game, with spending money being optional.Businesses aren't into charity, so if a developer doesn't have a high enough ROI to warrant developing a game, they won't do it. If nobody buys anything, the game fails.