I can totally understand the appeal of this; I have run RP's under one mythos of my own creation in 1x1 form and group RP form in the past, drawing off the same events but approaching the writing of the RP itself from different angles. Truth be told, I'm batting around doing it again, since I've preserved that stuff (having backed it up)

As an open source sort of repository of lore, it sounds good. One of the things we have a lot of here are people that like to create worlds, come up with lore and so forth. Communities like SCP and so forth seem to thrive off that dynamic and it can't hurt for us to add some incentives for our own native pool of talent to do the same.

Edit: Like tabletop and nation RP's, lore-creation does have a strong following and the idea of user-generated, voluntary-participation PW's sounds messy in theory, but I think in reality, it wouldn't be messier than the other RP's and the amount of information they generate.