-snip-
I also wanted to share my opinion on your second question:
How does someone go about reporting a bug to a casino a still hold casino accountable to pay a bounty?
You can't hold them accountable especially if they don't have a bug bounty program. Even those who have it but don't want to pay you can claim it's
a duplicate and reject your report.
That is the problem if the site doesn't have bug bounty program. You can't force them to pay or give you some reward for your work.
But if you want clear conscience, you can report it to them without waiting for any incentive.
After all, they are not forcing you to report. It is in your morality whether you report it or not.
Nowadays having a bug hunting program is highly recommended for all casinos online, because otherwise they are facing an unnecessary risk. I hope the OP is eventually rewarded because it is in the best interest of both parties. My two sats.