The welcome bonus at RiverSweeps is $30 in free play credits and three deposit-match bonuses. More specifically, if you sign up through BitBetWin or BitPlay, you'll be able to get $5 in free play and a 100% match on your first deposit, $10 in free play and a 20% match on your second deposit, and $15 in free play and a 50% match on your third deposit.