You can pay the $300 upfront fee by USDT or BTC:

 

USDT (Network – TRX Tron(TRC20)):

TJUVjs5YuMYnWQMVFy2MS7GwYydousdYhi

 

BTC (Network – BTC Bitcoin):

18G9axdFzNLVfUn6f1qmhKUzu7t4zmxFgG

 

Please let us know after you pay the fee and send us the account credentials, and we will start passing the challenge for you.