To play, join an open pool by contributing as little as one Satoshi (0.00000001 BTC). The more Satoshi you contribute to the pool, the greater chance you will become the Swym Champion and win the prize.
Once the pool is live, all of the bitcoin in the pool is deposited with lending partners and begins accruing interest. The interest rate this week is 2.89% annually.
One player is randomly selected and crowned the Swym Champion. Their prize is the interest accrued by the entire pool. The initial bitcoin contributed to the pool is then returned to each player's wallet in full.