Because people don't rwt in Runescape. People don't rwt in WoW, people didn't rwt in Diablo 2. Diablo 3 is not an mmo, other people having items does not effect your play experience. Buying success doesn't matter. You can play the game alone, with friends etc. While doing so you have the opportunity to make some cash with a lucky drop (or consistent cash depending how the economy will work). I don't know about you, but the prospect of earning small amounts of cash legitimately from this game far outweighs the fact some random somewhere in the world in an entirely separate instance/game gets to use that item. In Runescape currently I have lots of gold, I have nothing to do with it. I know I could technically rwt it illegally for 50 cents a pop. If there was an integrated system where I could sell my gold for real money, I'd be all for it. So what if someone else is suddenly allowed to buy all the gear he wants. they could of done that anyway via a third party site. If you want a challenge in Diablo, you play on Hardcore. Hardcore has a separate gold auction house & NO Real money auction house. PvP isn't even patched in yet & I'm fairly sure a minority of people play the game for solely PvP anyway. Some people should actually play the game and read up on it before joining the circlejerk. The microtransaction point would be valid if Blizzard alone were selling the items in a shop.