What is this trend I noticed in comments on multiple YouTube videos

I noticed on so many videos comments like these lately

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3 comments

Just a guess, but I'm thinking it's bot spam in an effort to trick youtubes algorithm into promoting the video due to the "engagement".
- Maybe it's a new spam bot like you said. But it's done in like every type of channel, even Prime Video heck even in videos on YouTube's official channel which I doubt they'd use it on their own videos.