Holy cow those are some fees! 

You have a minimum withdrawal amount of 1000 USD?
You realize that's kinda steep, right?

And your withdrawal fees range from 3.9% to 8%?

That's akin to charging a 0.0039 BTC withdrawal fee, if one withdraws the minimum amount.

All this on an exchange with 80K USD in volume?

I think you need to reconsider your business model.