I'm not in support of bidbots, as you likely know ;)
I'd add that it's like cheating the game everyone else is playing. Not for advertising, that could be done properly as regular advertising is done and label things properly, not to be confusing it with non-purchased votes.
I said this in a recent post about working to earn your way:
Additionally, the study on the lottery tickets is similar to how Steem works in a way, because you're not guaranteed to get upvotes, it's a lottery of having the chance of getting upvoted by larger staked accounts that reward you for the work/content you produce. Bidbots are like buying winning lottery tickets. You're not even in the lottery to maybe get an upvote, you buy an upvote to win the lottery each time. That's cheating the lottery, where everyone else has to play the fair game of winning the lottery while you buy your way to winning it.
Also, as more people buy guaranteed winning lottery tickets, there are less chances for others to win in the fair lottery as all the rewards come from the same lottery reward pool. If more people sell their votes, then less people are playing the fair lottery game and more people are selling guaranteed winning lottery tickets.
What can we do? Withdraw support for people who use them as I recently mentioned in a post.
Don't much care for them either, as you have probably gleaned.
The "purchased winning ticket" analogy is spot on... people are basically paying to be in the winner's circle, regardless of whether they belong there, or not. It's buying your way out of uncertainty... which, of course, people have been doing for a long time.
In some sense, we're battling history here. Whenever a "reward" is in the offing, we immediately attract a horde of "money for nothing seekers" who will basically "do whatever" to extract benefit for themselves.