And the only explanation i can see is that mr Langel got some funds to make bitcasino look like professionals

^That scam (or hack?) thing not only did bitcasino more famous but also managed to make them look like they know what they are doing as well.
Even if they were always like that, you need to see it yourself first to make a decision and I think this one was that decision point where many people realized how serious bitcasino is. Dude had to agree that he cheated the system and normally people who cheat and steal keep talking about how they earned it and even if they agree to cheat they ask for their money because they deserve it since they found the bug, but somehow bitcasino managed to make it in a way that dude just basically said "I am a cheater and will leave you guys alone" and left. That is a rare situation and I think bitcasino improved their trustworthiness very very quickly thanks to this situation.