Actually 2 others sites I use don't charge for withdrawal fees.
I just withdrawal from Sportsbet.io for free, and did so yesterday as well.
I am not playing in that site as they had a bad reputation of nullifying your bets if you win big time and come up with excuses ,what other site does give you free withdrawal without transaction fees,almost all of the sites were giving free transaction earlier but as the price increased they had to charge the users.