This might be controversial. Please disagree with me. When these were social networks, I remember my friends and later myself too, changed our profiles to public, send requests to random strangers, messaged them to like our pictures. We were teenagers and we were competing on who's more famous by having a bigger number next to our friends list or likes. There was no influencer culture back then yet everyone was tryin…
"We deserve it" is the tldr I gather from you here, just like people addicted to opiates are ultimately responsible for the way those drug companies systematically set them up for that, right? I disagree with you. These companies employ PhD scientists who know exactly what they're doing to find and exploit the kinds of vulnerabilities you confess to along with ones you and I don't even remotely realize we have. It's…
First, I absolutely agree with you that the companies "knew what they were doing". 100%. They were maximising everything that could be maximised, and it's impossible they did some of the things without knowing. There are also some leaks and releases that note this. But the way I see it, the networks were catalysers over something that is mere human nature. Yes, they benefited from it, but I don't think they caused it. Amplify, bring forward and profit from it, that we can agree on.
I disagree with you that companies are the sole root problem, and tend to agree more with GP on "human nature", because I've seen it happen before. In the 90s and early 2000s we had IRC networks, before the messenger apps. On IRC you had servers and then channels. Even then, with 0 "corporate" incentives, the people controlling the servers were "fighting" other servers (leading to some of the earliest DoS/DDoS attacks), and the people admining the channels were doing basically what GP noted.
Admins would boast with how many people they had on their channels. Friends of admins would get +v so they could send messages even when the channels were moderated. People chased these things. Being an admin, having power, being a moderator, etc. This is human nature.
Then we had similar things on reddit. There was this one dude that started using sock puppet accounts to boost his own main account. Not for corporate interests, but for human nature. He wanted to be popular. He found that upvoting his own posts early on, plus some fake questions would net him tons of karma. And he did it over and over again. There were also people doing this regularly on writing subs. They'd plot the history of votes, and figure out at what time they should have to post their stories to get upvoted. And they'd upvote with 2-3 accounts immediately, guaranteeing the very basic algorithm would put them up and keep them up. Reddit also played around with hiding upvotes for a time, and so on. These are all, at the core, "human nature" and not corporate things.
I'd add the stackoverflow demise as being related as well. Moderators, and "influencers" got so "powerful" as to basically ruin it for everyone. I very much doubt the corporation behind SO wanted this to happen. And yet it did happen, because human nature.