It's helpful for people to know what they are dealing with, much the same way you knocked ebay and their fees.
And like good publicity and word of mouth can be helpful, so can bad publicity and word of mouth be harmful to those people/companies, but also helpful to potential customers too. When you screw someone over, you might get screwed yourself. In this case, I am happily spreading my newfound distaste for COMC when it is appropriate, like I was pumping them up before when they were treating me right.
As David stated, they ****** around longstanding customers (both he and I were frequent buyers for close to 10 years) and it clearly seems to be in favor of the quick and easy ebay/amazon bucks. One of the biggest reasons for their success in my mind was the combined shipping (buy now, ship later model), but when a buyer buys now and chooses to ship later, when they are finally ready to ship they don't want to be told that 3 months from now is the best they can do unless you pay an expedited fee.
I don't see myself ever returning to them as anything but an occasional ebay auction customer (Maybe...but they are charging $5 s/h too, which is also a joke).