Well, they're paid for by someone. That isn't really my main point. Being allowed on the relays ultimately requires some form of payment, whether in social status, meeting some other arbitrary requirement, or money. Otherwise, there would be no discernable discrimination and we'd be right back to the starting point. Therefore, 'paid relay' is just a simplification that means limited access to some people meeting some standard set by the relay owner. Yes, some relays can be paid in full by an owner with no restrictions on who uses it, but I don't think that's the spirit of the post.