I agree on the non-necessity of downvoting posts simply because they've been botted. Promotion is a perfectly valid use case for bid bots. In fact, it is the original use case and it is meant to increase demand for Steem Power. Excessive use of bid bots or to just maximize ROI, the byproduct of which is the pushing of unworthy posts into Trending is grounds for relentless downvoting. But this particular post contains valuable information to those people who are not @aggroed's followers, too.