In order to protect ourselves against cases where players who are not well known to us are cashing out large amounts (this is for cases such as identity theft, fraud etc) there is a 4K cash out rule where by the sum is paid out to the player in lots of up to $4K.
Players who have purchased more than a total of $5K with us across all their CR accounts in all of their time with CR are automatically exempt from this rule.
Note that some of the wallets also have this sort of safety check so in some cases even if we paid the total amount out to a player they would still have trouble getting it in sums larger than that out of the wallet.
Cheers,
Yaniv