They drive customers away and make fun of them. I'll sum it up like this: ~snip~
It seems you have ulterior motives for expressing your unhappiness with eXch. Can you explain why?
But maybe everything is different. If they accept dirty public coins for Monero. Then the 5% fee is really ridiculously small, because it is usually 20% or more. Then suddenly everything is understandable. If that's the case, long may this business last until someone starts harassing them officially. But then they have low fees compared to others.
In any business model, if there is a consensus then it will have an effect. If people using eXch decide they do not want to use it for XMR because of the 5% fee then they are free to go elsewhere. As a result, it is the prerogative of the eXch team if they decided to lower the fee or not.
Can you be honest and explain exactly why you are posting in a negative manner about eXch? They have no scam allegations against them and highly respected but you have nothing positive to say about them.