Scammers at work, you should be suspicious of any platform that ask you to pay a fee to get your money out, most especially those that already offered you a large number of coins in their controlled wallets, most of them are fake money and are after that your fees to be their exit scam, once you deposit that $1000 acclaimed fees zoom they go into thin air.

Send them the message that they should have the $1000 fees deducted from the total amount and send you the remaining one, by that time you will know that this is just a pour scammer.