Yes, the business use case is compelling, although it's not clear to me that Steemit is a useful platform for businesses at this point. Promoted posts are segregated to their own tab, and I'm guessing that I'm not the only one who doesn't spend much time there.
Then again, vote buying might provide a way around this, but I'm not familiar with the details there. Making ads and promotions work here without replicating some of the problems created by major social media players is a big challenge for this platform, I think.
We'll face a lot of challenges along the way but steem got hige potential and will overcome them as well :)