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Yes, that 25% curation a significant part. Also taking into account only 50% of the amount paid in SBD, it is difficult to make a positive ROI.

That's why if I do use an upvote bot, I will only do it after several hours. So that the manual curators also profit a little bit from the upvote bot.
I hate it when people do use upvote bots instantly cause they wiped out all curation rewards for the people how are really appreciating the article!