Thank you for your question. I will do my best to answer your question. Please note that this does not constitute legal advice as I do not know all the specific facts of your situation. We have not created an attorney-client relationship simply through this communication. Also, please be aware that none of these communications are confidential and are located on a public web site.
I'd be happy to give you my opinion on all three issues you raise:
1. If this $2 per person charge was not listed on the ticket you purchased, the assistant cannot collect it. My suspicion here is that the assistant may be pocketing the money. I'm not sure this implies they aren't getting paid a salary -- it is likely just a way for someone to make more money, whether it's the assistant or the casino itself. In any event, if the $2 fee is not listed anywhere, I would raise a fuss next time so I wouldn't have to pay it.
2. Again, you will have to look at the coupon and signs. If you were never told when you purchased the coupon about the $5 charge, then it is not legal. There is a good chance the cashier is pocketing the money. But I would read the fine
print on your coupon to make sure.
3. This is 100% fine so long as 1) the coupon states a match is required and 2) you were told about the match at the time you purchased the coupon. The casino can change the coupon at any time. What the casino can't do is tell you that you're buying a coupon that does NOT require a match, then give you a coupon that requires a match.
What this really comes down to is what you were told at the time you purchased the coupon. The casino can't add on extra charges, fees, or conditions. Basically, unless the coupon says they can charge extra fees, they can't.
Please let me know if I can clarify any of my remarks.