It can definitely be profitable. The actual "product" Storj is offering is rock-solid. And I, for one, will definitely use it. My only concern is whether the public actually cares enough to be smart about their security. A lot of times, success is about who gets to market first. And with people heavily invested (space-wise) in things like Dropbox, laziness about moving could outweigh the protection they'd get from moving to Storj.