The rule is simple: for each cross-chain transfer through bchcc.cash, a check with some $CATS will also be sent to the receiver of cross-chain BCH. The rule does not take the status of the receiver into account. And the count is not limited: a receiver can get multiple checks if she transferred BCH through BCHCC.cash for multiple times.
The check’s $CATS amount is decided by the current $CATS price and a pseudo-random factor. At most cases, the value you get is a bit less than your paid cross-chain fee. But in some lucky cases, you can get more.
Good Luck in getting your checks!