Yeah, it sounds like its a catch-22. Can't get recognized without power, but they don't have the power to be recognized. Oh, I've got a idea, what if the the end of the talks, after everything has hit the fan, does the Paranet become members of the Accords. Maybe that's one of the things that Harry gets in everybody's faces about and he forces the other supernatural factions to do so. After all, PT is where the masquerade breaks, then having the various factions protect a group low-powered humans would be a gesture of goodwill. Its either that or piss off a species 7 billion strong.
But even if that doesn't happen, I've got a feeling that from a Doylist perspective, the Paranet is gonna become a part of the Accords, since much is being made about how this book is going to shake things up. That and I think Harry would be willing to sponsor them and if Elaine shows up, she might throw in her lot too. If we see her again, I think we'll get to see her surprise the WC with how strong she is.
But as for whether or not they should be Accords members, well they've already gained the attention of, and been victimized by predators, so at least this way they could gain some modicum of protection.