Thanks for all your posts and opinions, I wish I had more merits to send

And when it looks like I argue against your points/opinions, this is not personally against you and probably not even my own opinion, but to keep a discussion going and have different point-of-views, so don't be mad with me

Exploits take advantage of "mistakes" while scamming takes advantage of "ignorance". You can argue that mistakes and ignorance are the same, but ignorance only becomes a mistake once you know about it. If you were ignorant beforehand, it isn't a mistake, but rather ignorance.
This would actually mean that LAngel's case wasn't a scam, since Bitcasino knew about the software issue and even knew the person was a bad actor, as they stated:
This is not the first encounter we’ve had with this person and this was made crystal clear when we uncovered a 100% match to a previous user
who had been investigated and subsequently blocked for tampering with games.
(...)
Previously, this user managed to extract a large amount of BTC from ourselves and also hit a few other crypto casinos in a very similar manner.
Source: https://bitcointalk.org/index.php?topic=5260832.msg54754514#msg54754514So maybe the very first attempt was a scam, but all things that happened afterwards probably not according to the above definition. Just remains the question, if he made the following "scams" with the "same cheated" money.
Well, bookmakers have the right to not pay a bet since it could be an error of listing or because they are suspecting a rigged match.
I mean, they feel free to adapt and making what they want since you're using their service and accepting a TOS.
Absolutely not. You offered your bet = your bet has been accepted by some other one.
And this is something, which I find kind of "unfair", if that makes any sense. I know there is no way around it, but it's the same scenario. It's just that I am a private person with no T&C and no possibility to cancel/void an accepted bet, while bookmakers are always protected by their T&C and can basically do anything they want. Something which @Upgrade00 stated as well.
I will definitely take advantage of it, again, this is an exploit, it is a cheat. But, I can tell you, I will never be able to sleep for a while that is why I can just say that I will take advantage of it but, to be honest, I won't. Did I know this beforehand or I accidentally found it? Either way, I might take 1 bet or 2 before reporting this.
If you did a huge scam, there is always the question, if you actually could enjoy the money - I know for myself I couldn't.
Then one could also think about who the person is, who is scamming. If it's some poorer guy, who regularly scams smaller amounts from a (rich) casino site to feed some hungry mouths or send his kids to school, then a lot of people would probably be ok with it. If it's a person who has enough money (well, what is enough money) and just scams money to buy things he doesn't need, then most people wouldn't be ok with it I guess.
And then there would always be a judgement according to whom you actually harm with a scam. There surely is some difference in public opinion about scamming a bank, an insurance, a casino or a private person.