This goes outside the breadtube spear and more into general leftism, but there's a type of "rebellion" that makes people feel "in the know" and as long as there's a reactionary kneejerk reaction to anything american, these people will capitalize on it in the form of LaRouchian-Tier level conspiracies to pull people to their side. Besides Hakim, Second Thought, InfraredHaz, etc; communist parties in the US do have a presence and recruit via colleges, which heavily relies on this ecosystem to garner some kind of public support and maintain their current base. I can't argue that it's not getting stale, after all trump isn't there to immediately scare them (and "genocide joe" wouldn't make a difference so it doesn't look like that'll be a viable recruitment method again), and they're going to do anything to try and keep their movement alive, which I'm certain leftist tiktok plays an important role until some large-scale event happens again and they can spin it to their benefit. Averse to the 100th "Jordan Peterson Ben Shapiro said WHAT?!" video to try and stay up to date.
I think of the chapo movement as an example; their podcast and community was massive and it kept everyone on the same page until their reddit got nuked and people got a distaste for the "dirtbag left", the movement fizzled and they went elsewhere, and it's not going to make a comeback. Breadtube is the same.
I also think of some friends I used to know. I used to write a lot of essays, and at 17 I wrote "Fallout through a Marxist Lense" which was basically retarded, but a friend of mine wanted to do a video on it. She was super into breadtube, watched all of it, but had a hard time reading theory and literally just wanted me to do all the work for her. But what drove her was the dream of being a socialist with these other socialists in the breadtube sphere, a sense of belonging. Breadtube as a community offered a dream in a niche community where people could capitalize, and now it does not. Chapo offered people a sense of belonging in an in-group, the sensation of a real movement, and an arm against the 'alt-right' and now it definitely does not. But parties right now definitely are offering a lot.
The only problem I see, even though breadtube is stale, is that they've already done their damage. People just walking around with objectively wrong facts that are primed to inform them of what they should believe when they next large-scale event comes around, the aftereffects of this will be long and extremely annoying.