Then they should have had repercusions by losing fans and followers, I hope.This exact same situation happened with Smash 4. Every popular Smash YouTuber and then some said they had info on who the last DLC characters were gonna be. One of them even "leaked" it, though I can't remember what characters they mentioned. Come Cloud's reveal, they all revealed that they didn't know anything.
It's like if GameXplain one day says they know for certain Ridley and Geno, for example, are in, then, come to the full release of the game, one finds out they are not, and they say "hey we were messing around it wasn't true". I don't know about you but I would inmediatelly unsuscribe to their channel and unfollow them on Twitter, because to me they would have lost all seriousness and professionalism.