There is gonna be a serious economic crisis and the ruling class knows it. There was going to be one anyway but with COVID-19 it has accelerated and the real ramifications, especially the collapse of the export sector, in, for example, the car industry, will probably be felt in a few months and there is even fear of a second wave, at which point they might not even given a shit anymore. Sorry buddy, your grandma has to die for "the economy." So they're pre-emptively curbing platforms where people might read about alternative systems, CTH was a pretty big sub and it drew in harmless young Sanders voters who then got exposed to actual Marxism and communism, you can go on r/Sandersforpresident and pretty much talk about communism and Marxism openly and they listen. I saw many Liberation News article on that sub (the newspaper of the PSL) and they all got upvoted and people were agreeing with it.
Plus, with all those state interventions, the way that the neoliberal government can suddenly spend trillions on the economy like it's no biggie ruptered neoliberal hegemony. People see how big businesses are bailed out but they can't even get 100 bucks extra on unemployment benefits. The protests after the death of George Floyd probably were the final straw, and they decided to take action.