Results:

Paid 10.95 Steem
Guesstimate back 5.6 Steem + Couple of refunds in progress (thankyou)

Price at time of promotion
Steem $2.39 | SBD $1.70

Notes:
Negative ROI on many of these, after talking to some of the bid bot owners the reason for this negative roi seems to be the way in which the bots calculate the upvote value via the SBD prices.

The SBD price is currently being manipulated on hitbtc.com so the bid-bot algo's are playing up. Advice to anyone would be to use SBD and keep an eye on the SBD price on hitbtc.

It shouldn't be possible to go negative with these. A good way to look at this, is that these good bots will probably refund if you don't get the ROI as advertised.

Refunds in progress:
oceanwhale - thanks ;-) 1.53 sbd
brupvoter - thanks ;-) 2.62 sbd

I have not chased up the other -ROI losses which amount to about 1-2 sbd. These two were very prompt and helpful. In fact brupvoter have updated their code to try and get around this particular hitbtc issue. I recommend both for their professionalism, honesty and high quality service.