Watching them develop over the past few months. I've only seen them getting more bids. A few weeks ago my bids were generally worth about 3x their value. Now they are closer to 2x. I often see the profitable bids sold out 30 minutes before a vote takes place... though i have also seen what you are talking about where a profitable bid gets wiped out in the last few seconds.
I just don't really think the bot owners will care as long as people are still buying bids.
They might not, but if they can make similar profits and offer a better solution at the same time, then I think as productive Steemians they would wish to do so. Then again, we're all Humans so some might go for it and some might not.