This how I view somebody (and their product) who is not a sponsor and advertises without paying their fees:
I expect the same morals, service, and quality when dealing with them, that they showed when subverting the rules and posting their product.
Put bluntly; I will not buy their product, either new or used. I will not use it, even when offered by somebody who has purchased the item.
They have, in essence, created somebody who will never use or speak well of their products.
Just call me old school.