For me I think it has to be Russiagate. It’s just become a catch all for centrist libs to refuse to believe anything bad about their team, make up crazy conspiracies about anyone to their left or right, dismiss every contradiction of capitalism as “Russian interference”. It’s maddening. At least the RWNJ conspiracies like Q and the Alex Jones shit are usually pretty funny because of how ridiculous they are, russiagate doesn’t even have that going for it.
What are some other contenders?
Absolutely correct. Their audience has grown explosively due to quarantine, and people have nothing but time and a need for content that explains things to them.
Leftist ideals are less appealing, because we ask people to do things. Get involved, join an org, protest, organize, etc. Qanon right now asks them to "watch the show". But what happens when the show doesn't air? "When Prophecy Fails" suggests they won't drop away, instead they'll further radicalize.