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But the point is ...downvoted because people disagree with rewards or downvoted because the content should not be on the blockchain?

Spam was often cited as a reason even with rewards declined. @hiveusmaximus was an example (here and here). The owner stopped working on it as a result.

I'm checking the comments here: https://peakd.com/@hiveusmaximus/comments

Honestly it seems a completely different thing.