Changing the booking length by giving me a lower fee, both regulars one told me he'd forwarded his fee by bank transfer as agreed a few days before our booking, the other I was lucky I checked the money left on the side because otherwise I would have assumed it to be the length he booked. I have had similar with cam clients, to the point I've banned a few who treat me like a vending machine.
Recent experience with Escort clients is reinforcing counting up front as well as being clear with booking details.