Interesting times indeed ;)
Do you pay for the bot consideing SBD might have a higher value later? even though the return of the bot is higher than the payment, it is split into STEEM also. So now the bidders are going to run a very large risk, the bidbot owners still make a bundle. Do you think they knew this was coming?
I think it was only a matter of time. I also think that they are the cause of the problem (or the users of the bots are), because they are not destroying / converting the excess SBD as a normal user would.
Several factors going on to be sure.