This is really it. At Meta's scale, even if it's an long-shot for a competitor to hurt them, it's worth turning those low odds into zero odds.

Yet Zuck can somehow argue with a straight face FB has competition (apparently they straight up used to delete links to competitors like Google+ at the time, and also the constant copying of Snapchat) and Hacker News can split hairs over trivial definitions like "wdym fb no competition? email exists" or whatever