Maybe they do have something going with MS, like buying licenses for the game. They do ask for donations-totally voluntary-so maybe the $6.95 does go to MS, like song royalties. Sergio Garcia might even be getting a piece of it. LOL
FWIW, back in the day the only cost to play was the original program on CD. It was something like $35 and once you had it, everything else was free. All the courses were just DLs and there isn't any equipment to purchase.