Sweeps Coins are the main currency you want to play with as it offers you a chance to redeem the coins for real money prizes. The Gold Coins are used for free gaming with no reward options. Once you create an account, Chumba gives you free Gold and Sweeps Coins. Legally, the site can only offer free play options. Sites like Chumba can provide casino games like slots and scratch cards at no cost to you. Chumba Casino is a social casino site operating via sweepstakes rules.