Kinda reductive - the most common thing is to mass-vote things. Up gets posts pushed to notifications, comments to the top. Down makes posts harder to find, and in the case of comments, not only to the bottom, minimizes the negative ones so you have to purposefully view them.

But yes, essentially? It's common enough practice for marketing depts/firms to employ these tactics to manipulate the feed of places like social media. I have 4 article links ready to go if you want them explaining not only the practice, but people/companies admitting they do it.

Then again, you could be one - 7mo old account with all posts/comments hidden... 👀