If GameArt's slots are insecure, why haven't they released a statement regarding this? GameArt slots are quite popular across a lot of different sites so I find it hard to believe their slots had an issue like this.
"No system is 100% secure," I think I've read this on someone's personal text.
That's why game providers can disqualify bets on their ToS.
However, the provider such as GameArt can disqualify your bet if they see it because of malfunction and stuff.
https://bitcointalk.org/index.php?topic=5260506.msg54747214#msg54747214Slots malfunction isn't something new whether it's intentional (because of hacking) or not.
Nevertheless, this guy is soo skillful, I wonder if he managed to hack NetEnt, Pragmatic, etc.