I think it'd be a good idea to have one page on fan cards, but not separate wiki articles for individual fan cards, just like there's one page on Outtakes. It could have a list of relatively well-known, frequently-discussed, and influential fan cards and expansions (like the Outtakes page has), as well as advice on how to design and playtest a fan card (cf. Rinkworks's lengthy essay), the results of major fan-card design contests, and trivia (e.g., Courtyard is the only fan-designed card that ever made it into official Dominion). Maybe Archivist could get its own page, as the most successful individual fan card, just as Confusion has its own page, as the most frequently discussed outtake.