Yes. Of course the big platforms actively seek to undermine competitors. There’s billions of dollars at stake. Something that really convinced me was reading about how Facebook ran VPN services to spy on traffic so they could spot budding competitor platforms.
We know reddit used bots at the beginning to generate activity to make the site look popular. Something I’m not convinced they ever stopped doing. I believe reddit corporate still bots their own site for whatever purpose they require in the moment. I absolutely believe they troll their own site. Remember spez is the guy who live edits the production database.
I think it delayed the inevitable. By the 90s, right wing American extremism was on the rise. 9/11 put up a facade of unity (as long as you didn’t look middle eastern). The right wing movements went quiet for 15 years. America returned to trajectory in 2016.