That is what all social media is built on.

I once watched a one hour documentary called The Dark Side of Smart Phones, and they interviewed some of the founders and I remember one lady, I believe from Instagram, talking about how they noticed that gamblers at slot machines kept playing if they got intermittent rewards, even more than if they were repeatedly rewarded.. so they realizedthat if they showed someone’s post to different groups of their followers each time getting them different amounts of likes, it would keep the user more engaged, “eyes on screens” as she said, since they were trying to figure out how to always get as many likes as that one post got.

“Eyes on screens” was the whole goal, since that is what got the advertisers to pay more.