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You are correct, that bid bot bidding is confusing.
I sometimes see people make a 50 Steem bid during the last 5 minutes when the calculated ROI is already zero. If their bid is accepted they are guaranteeing themselves a loss and also everyone who bid before them. If it’s a bot with limits on losses great. But if not it’s sad because for some of those people those few Steem they Bid are precious to them and now they will lose a significant portion of their Steem.
However it is possible during early morning hours to be lucky enough to be one of few bidders.
Just be aware the weekends are the most active time for people to post and to bid. So it’s more difficult to get a good return.

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