GrandPlay and Sutwin offered a $250 bonus then asked me for $100 to withdraw

I kept seeing ads for GrandPlay and Sutwin, and both crypto casino sites looked like they were running from the same template.

The offer was a $250 bonus with code US250 that supposedly could be withdrawn immediately. The sites also claimed partnerships with major crypto brands, which already looked suspicious. When I tested the withdrawal flow with fake information, the platform asked for a $100 deposit to complete the withdrawal.

That is a classic advance-fee setup. If a platform says you have a bonus ready but requires your deposit before release, I would treat the withdrawal as bait.