It seems like there's no money required to join your pool. But in reality, the "cost" is the lost earnings of the 1% of the 50 BTC found in a block.
This is just like the pyramid emails I get where they ask me to send them $100 and then I can forward the email to 3 of my friends that will each give me $100. The people at the bottom of this pyramid scheme will always lose, because they won't have friends to help them make back the 1% they are losing out on.
Anyways, just my take.