MTG

Scryfall (and before it, magiccards.info) has been outdoing Gatherer for years, but I don't think Wizards of the Coast can afford not to have a searchable card database that they control. For all I know, they've offered to contract the work out to Scryfall, but Scryfall refused, or it would have been too expensive. But if WotC decides to just leave it up to Scryfall, and Scryfall folds, or makes an editorial decision WotC doesn't agree with, that would put them in the difficult position of having to revive and update Gatherer on short notice. They need a resource that they own. And as a player, I would rather they not own Scryfall. I think Scryfall is better because they get to make their own decisions.