At Shuffle.us, there are a couple requirements for redemptions:
You must have completed at least 1x play through on any Shuffle Cash (SC) received as part of a Gold Coin (GC) bundle purchase.
Players from Florida are limited to a redemption cap of 5,000 SC a day. This resets each day at 5AM UTC, or 1AM ET.
Players from other states are not subject to a redemption cap.
You may only redeem prizes in the currency you used for your most recent purchase.