What game or song have you played that only allows 5 times? Does your car keys work on more than 1 car?
Interestingly enough I know a couple guys that both have TransAms who, for whatever reason, tried their keys each others cars and it worked. They compared the keys to find the cuts were damn dear identical.
Never ask two questions in a business letter. The reply will discuss the one you are least interested, and say nothing about the other.