Not really the same thing, but there is an anon component to the Yuletide/Festivids/Yuletart model, where the work is posted but the author remains anonymous for a period of time. I've never heard the story of why it's done this way but it does create a space in which people post their recs and preferences without knowing whose work they're talking about.

I'm sure that in some cases it's perfectly clear who wrote what, the fandoms being small and the participants being known, but as a relative newbie I found it very liberating to read and post recs with author unknown.