If you didnt clarify that 200% bonus applies per person.
Since opening several accounts is allowed, yes?
And you added extra steps to ensure a safety threshold

The bonus amount must be wagered 50 times before a withdrawal / payout.

The maximum bet allowed when using Bonus Money is five ($5) per bet.

The real question here is , how much did he deposit ? And how much bonus did you give him ? 100 ? 500 ? 1000 ?