Staking a Tournament Poker Player
I pay 100% of your entry fee to a tournament. You pay me 50% of whatever you win in the tournament.

I pay 50% of your entry fee to a tournament. You pay me 25% of your winnings for that tournament.

A popular system of staking among professional poker players is to buy a piece of many players in a big tournament. A backer may pay 10% of the entry cost for 10 different players, securing a 5% stake in each of their winnings.