It's actually an increase in brokerage for those that place less than 11 trades per month - new minimum is $11 + gst. I use both IB and CMC, but generally use IB for what I expect to be short-term holdings and CMC for those that I expect to hold a little longer. If IB don't sort out their margin issues I may need to consider switching to CMC entirely in order to take advantage of the frequent trader discount, as the benefits of CHESS ownership will make it worth paying just a little more than IB's brokerage if the ease of ordering and margin issues are more or less equalised between the two.