Casinos will always point to violations of their terms of service, and the worst is when they change their terms of service without informing their players, like when they first created their terms of service and then changed their terms after a few months without notifying them.

This is one instance where they intentionally try to scam their players. This is a sneaky trick that players should be aware of so they will not caught violating their terms.

If you think you are playing clean and the casino does not want to pay out, creating a complaint on forums like Bitcointalk can help your case. Casinoguru and similar review platforms are also good options. The goal is to make it known to the casino that you want them to address your concerns.