Neteller NEVER charges you unless you

A) Use that stupid neteller debit card
B) Use the "instacash" option, because in essence, they're giving you a loan.

That about sums it up. They make money by charging the casino's every time you cash in or out. I think they do the same thing the CCs do, something like 5%?

At any rate, you, as a player don't have to worry about that, and you, as a player, don't have to care. Why? Because the casino takes in far more rake than you'll ever imagine, and that takes care of these "operating costs of an online casino.". :P