Hi there 
Since the thread was recently moved to the right forum (and I appologize that this didn't happen earlier) I would like to push the thread up to the top again. Hopefully my answer will still be helpful (especially since the anteup WCOOP event takes place today) and maybe we can get some discussion going on the topic.
The AnteUp tournaments are exclusive to Pokerstars afaik. Even there they are not very common. Therefore it is hard to give you many advice since there is not much content on it yet.
I will just add some of my thoughts:
- you should play very loose
- steals are extremely important
- your position is even more important then it is in standard tournaments
- especially in late game you should steal a lot, steals for 1/3 potsize are very profitable in this stage
- open folding is not a valid play in the later stages. No matter what hand you got - you always have the odds to limp your hand. The investment for a limp is very marginal (5 Chips)
- I would open raise between 1/4 potsize (late game) and 2/3 potsize (early)
Regards,
Asaban