The terms for the bonus were very unclear:


You said "bonus can only be claimed once", and despite me asking twice for clarification as to what that was meant to mean you never provided the requested clarification.

I think the most obvious interpretation would be "once per account", since the site wouldn't let me claim twice on the same account, but would let me claim twice on the same computer, from the same household. I don't think it's fair to withhold funds from players who misinterpreted your incredibly vague terms.

It's also very rude of you to call this player a scammer. He wasn't scamming you. He was playing within the stated rules. If you offer stupid exploitable bonuses please don't blame anyone but yourself when people inevitably try to exploit them. Promising a bonus and then refusing to pay it makes you the scammer, not the people trying to claim the bonus.