Promobot is meant to be used to get more attention to your content by raking it higher and does not give votes worth more than the amount paid for promotion.

I understand your concept but then you should have steembottracker updated to say your max ROI will be 0% after curation. This will save you and others who use the bot lot of time and frustration. I already wrote to @yabapmatt but didn't hear back.

Protection from overbidding that limit your promotion cost to 6.5%.

If you are offering 0% ROI, it should be 0% overbidding. Just seems fair.

I would use your bot if you had these two things in place.