X is fake. It's just full of bots and government propagandist profiles. If they got rid of the bots and propagandists it would be as small as Nostr.

Facebook is still massive and the most popular but most people are afraid to talk on it in fear of get banned. Facebook is lame but the features of Facebook are the best. Facebook is the king of features, Nostr can't even compete YET, but since Facebook censors and bans. It's garbage now.