Do you really need a new cryptocurrency for this? I thought about how to build StorJ many times and at no point did I never need anything more than standard Bitcoin as it exists today.
You don't _technically_. But it is a very good way of funding a decentralized protocol economically. I personally think the ugliness to benefit ratio here is several orders of magnitude lower than something like proprietary software, mandatory fees or, satoshi cyber christ forbid, DRM.