High antes in tourney gives you incentive to try and steal the blinds. This is a good thing to try to do with hands that maybe aren't ideal, but can still win if a steal attempt is called (Stuff like AT, suited connectors, etc.). Stealing blinds and antes adds up quickly - you're getting about 2-2.5 BB per successful steal, a godsend when you have 10-15 BB. It can be tricky when a steal attempt fails, however. I personally still need to learn more about it myself.