If you decide to use these bid bots, understand that nine times out of ten you will most likely get the raw end of the deal. When the vote value becomes outweighed by the total bids the ROI (Return On Investment) goes into the negative. Even if you manage to get an upvote of say 36% ROI, you will still be losing SBD, and or especially the Steem you bid. the reason for this is that the 50/50 SBD/SP payouts aren't really 50/50. Lets just say that you bid $5 SBD, and got an upvote of 100% ROI. The bot upvotes your post to a value of $10.00. Now, lets say that the Steem price held steady at 4.00 the last seven days until your post was paid out. $10.00 x .75 = 7.50. 7.50/2 = $3.75, so you would think that you would get $3.75 SBD and $3.75 SP? Wrong! You would get $3.75 SBD, but the amount of SP you receive is convoluted, and I think a bit of a bait and switch. To figure out what your SP payout will be, take the amount of SBD you earned from your post, and divide it by the average value of Steem over the last 7 days. 3.75/4.00 = 0.9375. Thus, 3.75 + 0.9375 = 4.6875 is what your combined SBD and Steem are, so even at 100% ROI, you still don't really make a profit. The people running these bots, however are making a killing though.