I'm not really sure what to think of this experiment. At this point though I've pretty much dropped my bot theory (and my other suspicions of webtoons as a platform). I think the readers you're getting are genuine. I guess I just seriously underestimated how much the size of webtoons could influence someone's views and ratings.
For comparisons sake you may want to mirror the blank canvas comic on tapas. Not because I think there are bots here but because I'm genuinely curious about how readers here would react.
(By the way, I really like modern art and I think blank canvas paintings are really interesting, some of you probably could have guessed that about me though. I feel like a larger discussion about how the general webcomic community/readership thinks about that side of the art world would be worth having? This experiment seems like a good catalyst for that conversation to me. Maybe I'm just begging for a can of worms I dunno.)