They aren't. As an active user of 8chan I can attest that the shills make up more than half the userbase. Especially on /pol/. There are even "Russian hacker" faggots who are UNIRONICALLY pushing the Russian hacking narrative. It's depressing as fuck but it's also hilarious to mess with them because it's like poking a beehive.
Then you have bots which have seen a decent increase in activity. Whenever an important thread on a more populated board starts to gain traction they slide it with bots who spam nonsense for no reason or create threads with no apparent purpose. You can see it happening on /tech/ right now.
People are already jumping ship and not returning. I have no idea where they are going because they won't tell, which obviously I don't blame them for, and the only ones sticking around are anons like me who don't know many alternatives and are pretty much stick with 8chan if we want a faster conversation platform.