In poker what's that word that means when you pay someone else's buy in?

Question

Like sometimes let's say in the World Series of poker, someone will pay someone else's buy in and if that person wins money they split it 50-50. What's that word is it like spot?

Answer 1

Stake

You can stake someone 50/50 in a tourney and if they win, the 2 parties will split the profits.

Answer 2

Sponsor?

Answer 3

It's called "staking" them.  They then own a "stake" in you.