This min withdraw 25$ is for always? Or just during for this promo? If only for this promo then it’s okay.
It's because you have to pay a fee of 0.0002 BTC. So, it's not possible to lower the min withdraw for BTC to $10. For other currency, it can be lowered though. Instead of minimizing the min withdrawal, I would rather ask to minimize the withdrawal fee though sometimes, the fee required is high.