Please note that right now, supply is much higher than demand. This means that so far hobbyists, idealists, enthusiasts are simply enough, Storj just doesn’t store enough data to bring business to professionals. That doesn’t rule out involving and attracting professionals in future—I’m just stating it’s not necessary just yet.
As for gaming the system, there is an idea to more accurately determine location of nodes. The moment Storj Inc. figures out that cheating is too high, they will implement it. Again, right now it seems cheating is not a big enough problem yet.
As for incentives for node operators, Storj Inc. never stated that they’re fixed forever. They will need to be changed to adapt to the changing environment. Maybe at some point some incentives will be developed to attract professionals. Right now, the current incentives seem to attract enough storage owners already.
You’re looking at a young system that does not implement all ideas possible yet, but there are plans to. And if you are impatient, well, Storj Inc. accepts patches.