I'm game for a bit of Bidbot gambling and agree with @aggroed's post linked above.
Why should I have my content sit lower than some of the utter shite that offers no engagement, no encouragement, no prizes, etc.
I'll continue to use them, mostly between 30-2 hours from post creation, to try to boost my content a little, especially as i'm not using my own vote on my work these days.
Cheers!