Probably for bot-farming.
Automate the process of buying the guaranteed profit vote, get at least the SBD you put in back and also a little bit of SP on each dummy account, operate a huge ring of bots and hope steem/SBD stay about the same price for 7 days, then power down all the accounts, sell the steem and recycle the SBD to buy more votes endlessly. Easy way to farm money for the organizers of the bot-nets, I'd guess.