I don't use bid bots. As you have mentioned in your article, they are often oversubscribed which just turns into a lose-lose proposition for everyone.

That said, I view such bots more in the sense of post promotion than a means of earning. Then again, there really isn't any reason to pay out of pocket if the bot can return the initial investment at the very least. Which is also the reason I love @minnowbooster since it's the most user-friendly upvote bot out there right now.