Vampirism -Folklore/Fantasy 6-8GM
If you do want thoughts on the idea, then here's three things where clarification might help you net some players:
1) I have heard of GM-less games working on RPoL but never seen it myself. Every "everyone decides the setting" game I've personally observed or been in has died as soon as it gets going, usually due to someone vanishing. It's like the free ice cream problem: the more people in there, the higher the chance that everyone has to settle on vanilla as the midpoint between tastes. I advise being the GM but asking either directly for story hooks/relations towards other players in the RTJ, or asking what general sorts of plots people like in said RTJ and picking the ones that'll fit in with what would inspire you. Others who've actually seen the everyone-sets-up thing work could give you better advice on that if you were really keen to keep it, though you might need a different thread.
2) what is the tone of this game? I can't tell from the description whether it's like freeform World of Darkness or What We Do In The Shadows, and those are very different things, even assuming it's Western vampires we're talking about. Where is it set? What would folk be singing up for in general?
3) where does folklore come into it? Most folkloric vampires are described as asocial apex predators if they're discernibly sentient; they don't have friends, and devour rivals. Stoker having Dracula keep a harem was just the "sexy vampire novel" of his day...are these a collection of vampires from different traditions who don't have so much prey overlap they need to fight about it? Modern cinematic social vampires with folkloric weaknesses? Modern-style vampires, but the plot is taken from folk tales? Using the folklore of vampires being plague-bearers to have them interact with the pandemic? Are players playing actual dubiously-sentient folkloric vampires (which could be an awesome stealth/strategy game, just not a character-driven one, because 'stab Sergei with your freaky serrated tongue every night until he dies or someone puts seeds down' or 'hop onto unfortunate villagers' shadows in the moonlight until they draw a line around the entire settlement with male virgin urine and someone calls in the local Taoist priest' isn't much of a personality)? Penanggalans? Penanggalans are relatively social. I think you would get fewer people, but with higher interest (and so staying power) if you clarified which bits of folklore are being used.