A a minnow who spends a great deal of time and effort on my posts, I appreciate the opportunity to trade 2 SBD for an upvote worth more than that. I think the best I ever came out was a 6 SBD profit.
I don't see how it's any more incentive to shitty posting than the ability of someone to throw money at Steem and buy weight on the platform. At least randowhale is accessible to those of us who don't have thousands of dollars to go that route.