I do expect an ROI, but not today. I expect that the reputation service will improve the Steemit platform and improve my individual experience/success on the platform. I delegated before I even knew there was the possibility of an upvote. And the fact that I must then compete during each upvote round doesn't bother me at all. It's further support of the idea of this new type of reputation score; you can compete for this upvote based on your level of interaction rather than the age of your account.