You seem to understand the basics of contract law. However you seem to miss that cases are decided by people and not robots, and judges have a great deal of leg

You seem to understand the basics of contract law. However you seem to miss that cases are decided by people and not robots, and judges have a great deal of legal flexibility. That being said, if someone did threaten to sue I highly suspect that CAH would refund the $5 since even a single lawyer's letter costs more than the entire case is worth.