See the below image people have send the bid to the bot even though it's giving -50% ROI. Why would you do that?

When in doubt always use https://steembottracker.com/, and then check what is the ROI Limit of any bot before sending the money. Most of them does not give any details about it then there are Bots which has a capped value of 10% or 15% ROI, so that Bid Bot will not receive any bids if the ROI goes below that threshhold.

Use BidBot Intelligently, Check ROI before investment