I suspect 3 reasons for these idiotic concepts popping up.
1. someone is dropping a music/movie/book that needs to get his name in headlines and says he believes in something stupid or does something stupid. this is usually musicians but could be anyone. "So and so says Santa is real. etc"
2. just regular broke people who need clicks on their youtube channels and sites to make an income
3. someone suggested a government project to see what the public is willing to believe no matter how stupid it is (and to what extent)