Do the Rakeback Rewards expire?
While the Instant Reward has no expiration cycle, the Weekly and Monthly Rewards must be claimed before the next distribution period starts. Otherwise they will expire.
To claim your Weekly Reward, you have till the end of the week, starting from Monday when the reward is available. To claim your Monthly reward - similarly, till the end of the month.
Expiration times:
Weekly: 23:59:59 Sunday (server time - UTC)
Monthly: 23:59:59 of last day in month (server time - UTC)
Once claimed, the coins amount itself has no expiration date to be used.
The keys though come with 7 days expiry as usual.