4chan dates from 2003, for reference.
It may be the case that algorithmic feeds and social networks that have one giant global context tend to expose stuff like this in ways that would have been less likely on the early web. 4chan has always been pretty awful but you wouldn’t have seen it unless you were on 4chan, which for most people was “never”. The norm at the time was to be in multiple different communities, and there typically wasn’t much overlap.
By contrast, TikTok is all one big space, and if the algorithm wants you to see something you’ll see it. That part is new.
Maybe that falls under “monetary influence to drive engagement” in which case I suppose I agree.