When you purchase Gold Coins and receive Shuffle Cash (SC) as a bonus, that SC is subject to a 1x playthrough requirement before it can be used for redemptions.
This means you must play through the amount of Shuffle Cash once before those funds become eligible for redemption.
What This Means
Only Shuffle Cash received alongside your Gold Coin purchase has a rollover requirement.
Other Shuffle Cash (e.g., winnings from games) does not have a rollover requirement.
Example
If you purchase Gold Coins and receive 10 SC as a bonus, you will need to play with a total of 10 SC (i.e., 1x) before you can access redemptions.
How to check how much I can redeem
If you receive additional Shuffle Cash with a future Gold Coin purchase, any outstanding rollover requirement will be updated. Redemptions will remain unavailable until the new rollover is met.
You can always track your progress in the Redemption section of your account, found in the wallet tab.