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.