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I guess you don't know about the upvoting bots. A bulk of your upvotes are bots who are just tainting your post. I wrote about it yesterday - https://steemit.com/steemit/@liberosist/bots-upvoting-posts-an-investigation

It's the same bots that attacked my post too.

You talk about this one: bison015?

bison015 posts a lot of "keep up the good work" but I don't think it upvotes.

now I understand. thanks a lot