I lost £500 to RedBet, can't remember how now but I probably played Mega Joker before I checked. I've lost a couple of thousand doing that across sites before I started reading the terms religiously. I also keep a list of unplayable games available so I can double check before I play them.
In this case it's false advertising that caused the problem and the affiliate who presented the ad should be held liable. RedBet aren't responsible for all their affiliates.