So Yuletide Treasures/
yuletide is an annual fandom thing, where 1000+ fanfiction authors* sit down and do a secret-Santa style exchange focused on rare fandoms. Basically, with the idea that there are boatloads of Harry Potter stories, and you could even find a decent number of, say, Discworld stories***, but finding a story for Beyond Good and Evil (example chosen to tempt
yuuo) is harder.
( Now, every year, it seems like two things happen: )--
* And others. I mean, you could probably fill a request/offer sheet with just Fairy Tales and Mythology, which is technically fanfiction but most people won't object to, say, retellings or 'with a twist'. Or, for that matter Historical** Real Person Fiction. Or 'fiction based on songs/music videos/commercials/gmail themes'. Yes, seriously.
** Or modern, but most people seem to treat writing about modern celebs or politicians different than Shakespeare or Queen Elizabeth I. Probably because the latter have been dead for ages, and half-mythologized.
*** Though part of that is that Discworld got a lot of attention in previous Yuletides, so it's kind of aged out.