Hey @stackin - I completely agree that it makes no sense to spend SBD on a vote bot right now! Some vote bots accept STEEM though which actually makes them a REALLY good value because you get 50% SBD as your post reward.
So it's a way for you to sort of trade STEEM for SBD at a really good rate. The two bots I know of that accept STEEM right now are @postpromoter (which is my bot) and @booster
You can check the site I created http://www.steembottracker.com to get all of the info you need about the bots including which accept STEEM bids.
.. and smartsteem - but yabapmatt's site shows that too. Amazing site you've build!