The people using the bots are breaking even and not making more money than they put in.
The bot reward is closer to 200% if you are lucky and there is not over bidding inside the 2.4 hours.
So $1 gets you $2, but on payout day you get $2.00 - $0.5 (25% curation reward) = $1.50
But then this $1.50 is split 50/50 between SBD and Steem.
That is SBD 0.75 and Steem $0.348 (Steem/SBD = 0.93)
You get less Steem because of an error in the system. SBD is pegged against USD so it is 1 USD for 1 SBD). But to get Steem it is $1.50/2/2.12 = 0.348
So you get SBD0.75 + SBD0.345 = SBD1.10
Minus SBD1 you paid = SBD0.10
You will get that if SBD stays the same over that 7 days. If SBD goes down you make a loss.
The people using the bots make little or no money using the bots.
Duplicated reply. I've upvoted the other one and I will flag this one.