As long as your Club iWin subscription is active, the iCoins will not expire and will continue to accumulate each month.
If the Club iWin subscription is cancelled, the account will remain current until what would have been the next billing cycle. During this time, you still can enjoy all the benefits of your subscription.
At the conclusion, unused iCoins remain in the account for 120 days from the date of the last subscription charge.
If you find you have any iCoins expire, please submit a support ticket with customer service so we may help!