I don't even think about taking advantage of the bugs in a casino, because when that happens, they will also detect things that are not natural when we win a game for example. When that happens it will affect our account which may later be limited because it is detected and considered cheating. In fact, it is not cheating that we do, but rather take advantage of something that we can benefit from.
Yes you are right, they can announce such things, not for the purpose of contests or the like, but for their interests as well.
I honestly wonder, is it easy to find bugs. I'm pretty sure that, it's not that easy. and even if someone finds a bug to cheat the casino, there is a risk that must be borne by the culprit. even then, if the bug works it can be used as a medium to cheat the casino.
Well, the problem is that every casino usually has security to prevent these things. moreover, for a reputable casino that has a lot of customers. in fact, every casino always carries out maintenance which is their routine.
Theoretically there is no single web or site related to the internet, which cannot be broken into. However, not just anyone can do it. even then, the perpetrators must know, that will not produce anything. because any fraud that is committed will definitely be detected and the casino will swiftly suspend accounts involved in fraud.
by the way, this is only based on my personal point of view. after all, what is the essence of cheating in gambling. for example playing slots, if you know you're going to win by cheating, it's no longer fun. except, someone who has bad intentions to get easy money from the casino.