To qualify for redemption, each Sweep Coin must be used at least once (1X). For example, if you have 50 Sweep Coins, you need to play through all 50 SC before redeeming them for a prize.
Sweep Coins obtained through giveaways have a 10x rollover/playthrough requirement. This applies specifically to Sweep Coins earned through bonus codes, daily bonuses, or promotional giveaways.
If your would like to view the current list of excluded games, you can open your wallet, click redeem, and then click the hyperlinked list of games to see the most up-to-date exclusions.