Thank you @melissaofficial for your comment. Yes, I promoted to 3 bots for 12 SBD, but I got back 27.46 STU from them, which is 13.73 SBD as seen here: https://steemworld.org/@gmichelbkk. A little profit this time, but I will get only 75% of that, which is 10.29 SBD. I got back less SBD than I put and the big winners are curators who get more than they would have if I hadn't used the bots. The number you looked at is the total number for all votes and 25% of that will go to curators. I suggest using 3-4 bots for your bids so as to divide the risk if one gives you a big loss. Bots are not for profit, but promotion.