Yeah, I think everyone who was a fan of Chapo/Trueanon in 2016 has moved on to The Deprogram / Blowback / Democracy Now! etc.
I really doubt that this is the case. The Deprogram seems to have a much younger audience than Chapo and TA (at least if their subreddit is anything to go by and a lot of their stuff seems to be purposely geared in that direction as a sort of "baby's first socialism"), and DN is just a completely different concept altogether. Blowback seems to be popular with basically everyone, but is also a very different concept.