There aren't many interesting things to do as a Zoner, yet there's multiple Zoner factions. With a low demand and a high competition, you guys will have to swim upstream. Being present and letting others know who you in fact are could be a good start. I think most players who aren't vets don't even know you exist (or existed).
Alternatively, you could try to establish yourselves as the dominant religion of Sirius, or at least a clandestine cabal with influence in high places. That way you could get vets interested in RPing with you. I've always wanted to connect a certain character of mine with a secret society, but I just have no idea what the TAZ are supposed to be about. Your lore is hermetic and requires the member to have an understanding of anarchist thought, but there's no incentive to invest effort into that because being a member doesn't give anything I would imagine someone could want, and temporary autonomous zones are such an obscure concept that I doubt you'll find many that are interested in it just for its own sake.