What 's happening is that transaction fees are at an all time high on the btc network. If Polo doesn't use a high fee, the transactions might take unacceptably long or even get stuck and people would blame Polo and bury them in support tickets. I'm making periodic usdt withdrawals and the fee used to be 8 usdt. Then one got stuck for days, i contacted Polo support about it and now they increased usdt withdrawal fee to 25 usdt. It's ridiculously high but needed. Now every withdrawal i make is included in the next block. I still remember the time when a btc transaction cost only 5 cents and the low cost was considered on of the biggest advantages of crypto.