The proven concept Pool Party is using is traditionally known as PLS, ”price linked savings accounts”, or ”no loss lottery”. A PLS is a savings account that is incentivized in a way to make the account holder save more money. Research and proven real life cases in various PLS programs, have found that the savings amounts, and the amount of savers increases when there is an incentive. Prizes, depending on the PLS program, can be anything from tens of thousands of dollars, to tens of dollars. https://en.wikipedia.org/wiki/Prize-linked_savings_account.