Unless they are Reddit bots.
There are stories (not sure of their truth) of regional subs being started and filled with reposts translated to the regional language - to the point of idioms not making sense when translated.
There are pictures of a while string of comments from different accounts saying "time to dust off my laptop and use the web version I guess" (or something like that).
I have absolutely no doubt that Reddit is using paid actors or AI actors to generate/push content/interactions