How many exchanges you know of that have too high withdrawal fee? I was shocked that Dcoin exchange wants 0.001 for any bitcoin withdrawal you want to make while other exchanges charges only 5000 Satoshi for bitcoin withdrawal, I was forces to exchange my bitcoin for litecoin before getting my coins out
A lot of exchangers have high fees especially if it is bitcoin that you wishes to withdraw. Some fees depends on how popular the cryptocurrency is. While in some, the fees are doubtfully cheap that they might be scam. The best way to withdraw in my experience is to convert first the bitcoin into some altcoins then I will withdraw that altcoin. It is relatively cheaper in fees.