I think you will be better off at a different mining place.  You seem to act like this place is out to rip you off or something.

Why should he NOT charge a fee, running mining pools cost money, bandwidth cost money, hosting cost money.  A run of bad luck costs money.

If he took the money from the other currencies then you would probably cry that he is ripping you off by stealing your other currencies  

Again, if you do not like the fees, you are free to go mine elsewhere.  Or better yet, open your own mining pool, maintain it and run it however you want to.

Aaron