The winner of that particular rack collects the others' wagers. If a player's chips is less than wager, that player has to go "all in" which means all of that player's chips must be wagered. After every four , the wager rises.
In this game, the champion gets to collect the other players' stakes after each round. However, if a player doesn't have enough chips to cover the bet, they're forced to put everything on the table, or "go all-in." The wager grows every four rounds.