Quote from comintel:
Did you try negotiating, ie. telling them that with your particular approach to trading you need them to stick to the commissions previously agreed to for your own account or you would move your account?
You probably have to actually be prepared to move your account for this to work.
I didn't, but they still offer the cheapest rates without negotiating. Now they have increased their profitability after having increased their client base the last years. Their service has always been fine. I was only surprised that they pushed this raise - never heard about a broker raising its commission, normally it goes the other way.