The manipulator is clear, play €100 hands at, say, Blackjack and get either €10 cashback or €100 or €150 winnings. This works because 10% cashback is played on EACH losing hand, and not the total loss on the day.
The CORRECT response would be to remove the bonuses credited, and recalculate the amount due on the TOTAL loss for the day. This casino seem to be behaving in a rogue manner, they are voiding ALL bets of winners, yet are quite happy to string along the LOSERS by letting them keep the erroneous bonus credits so long as they lost overall.
To resolve this in a FAIR manner, they should use a solution that is the SAME, regardless of whether the player won or lost. Worse, they seem to have run this the previous week, and must have known there was a problem, but seemed happy to let it continue until enough players spotted the loophole.
If they are voiding ALL transactions, they MUST refund LOSERS, as well as restoring winners to their starting balance. The T & C for the promotion DOES NOT ALLOW THIS ANYWAY, they state that the resolution should be:-
Quote:
Interwetten may cancel, terminate, modify or suspend the promotion or these terms and conditions at any point and for any reason, including for technical reasons such as and not limited to computer viruses, bugs, tampering or technical failures.
We will remove prize credits from the account of any member who fails to comply with any of the above conditions.
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This states that the resolution they have allowed themselves is to
1) cancel the promotion
2) recover the erroneously paid prize credits from ALL PARTICIPANTS
They seem to have decided to do something completely different, and something that lets them "have their cake and eat it".
They seem a good candidate for "not recommended", although they fall short of full blown "rogue" status, although this depends on how they handle this in the following couple of weeks.