If it is a user interface bug, expect no more than a pat in the back. If it is a non-exploitable/non-vital platform bug, don't expect a reward but it should be more likely to get one as it may help patch a hole in leaking/lost business as a result of the bug. If it is an exploitable bug, it should definitely be rewarded.
That's my 2 cents generally...however...
In my opinion it's a substantial bug but again I'm not qualified or educated enough on it. But if I can exploit it then others would have fun. Very reputable casino with a large reach. I've contacted support and waiting. No bounty page on their site but for sure reputable so I hope they would compensate given the bug.
looking forward to what they have to say when you show them what bug you found, I am also curious about which casino you found this bug on and what issue/exploit the bug is causing(would you mind sharing what casino it is? you don't have to if you don't want to share the name of the casino).
BC Game. I messaged them on here yesterday but no response
...I wouldn't count it from this casino. They've been known to hold balanced and freeze funds for extended periods of time, until they suddenly had someone come and solve all problems months later. If you didn't message that account handling their "PR 2.0" (so to speak) then you can do so here:
https://bitcointalk.org/index.php?action=profile;u=3592321 - This profile is the support account. The OP of their thread is (apparently) for some other purpose.