The whole point of free to play is to advertise your product. No support is bad advertisement.
I could see people taking advantage of that, but you have to take it as a company. DDO might have been the big free to play pioneer (I dont know my gaming history, but I've heard that) but ftp is getting more and more common now.
As a consumer with a plethora of options, the bitter taste in my mouth left after not being able to receive support for an in game bug might be enough to throw me off if I was checking your game out.
How many people do you know who play ddo dont spend enough money to qualify for the support?
Just remove the pay to receive support stipulation, it doesnt look good imo