My understanding is it gets the counts of dislikes from participating content creatos (the dislike count is still there, it’s just hidden except to the video authors) and for non-participating creators it uses data from the users with the extension. I think it applies some smart logic to predict the dislikes based on user feedback in that case, which may not be 100% accurate, but is likely at least somewhat close.
And that isn’t even getting into their drivers and software. Foolish me bought a printer with a scanner and thought I’d be able to just install one little piece of software and be able to print and scan. How silly of me to forget that I to search Google to find instructions that weren’t provided by HP, and download an application that the printer’s instructions did not tell me to install, in order to get the it working.
I almost want this printer to die just so I can never own an HP printer again in my life.