CoinOut offers options to redeem rewards via Your Choice Gift Card, Amazon Gift Card, or PayPal with different amounts available based on your level.
If a reward is locked, you either need to earn more Coins or wait until you've reached the minimum required level.
To check which rewards are available at each denomination & the minimum level needed to redeem that reward, see the chart below:
X indicates that the reward is not available for this amount
For information about how often you can redeem rewards, please see this article.