There are numerous reports saying bitbet scammed users.
Sore losers are always going to complain. You will find such 'reports' of no value for any gambling site that does actual traffic.
Just because you included a rule that says you can steal peoples money doesn't make it legal. If a bet is not confirmed in time it has to be returned. You (having invented such a ridiculous rule) may see nothing wrong with it but most people agree that it's BS:
https://bitcointalk.org/index.php?topic=339544.0