Many thanks for the info that you all posted here.
I think I'll find my way to a fair exchange platform now.
2-4% is not big gap for BTC I think.
My apologies, but 2-4% is insane imo.
What if someone would want to sell a million $ worth of bitcoin?
He'd have to pay (lose) up to $40.000,- just for a service that takes little time and effort.
That's just very wrong.
I bet that 90% of the people that buy at such rates are unaware of all the facts, such as the 2-4% commission that is charged.
It's just like visiting a mortgage adviser, assuming that he will help you to find a best mortgage in the market for your personal situation, while in fact, he has secret deals with only a few of them and will channel you to one of those and shovel in his secret percentage with that corporation.
Insane in comparison with what? In traditional finance we have such commissions (or may be i mistake?)