NoMoreOptions/QDZ: the option cancel fee has NOTHING to do with a minimum commission requirement per month. If as you suggest you used to trade options (or still do trade options), most likely you pay a data fee and then there will be no additional charge to you.
IB raised the minimum to $10 per month from those over 25 years of age (those under have a $3 requirement). BUT- US stock data feeds cost $10 per month. we also seem to have a some people who are opening accounts for our futures data feeds and not trading with us. Some of the overseas feeds are free or cheaper than other providers. Finally, a good portion of requests for help come from accounts which generate very little commission income.
The end result of the increase should be (assuming those who don't like it close their accounts) better utilization of resources for those that actually trade.
Note: this fee only affects those that choose not generate a total of $10 in commissions AND/OR market data fees.