There will be a variety of incentives around the base protocol. I like that's not tightly coupled to currency. It makes IPFS a natural complement to a variety of other systems.
You can't really call a protocol "struggling" -- adoption and resiliency are issues, for sure, but the inherent nature of the protocol make it very well suited to sharing certain types of information.
For instance, posting images and other binary files to steemit via IPFS could be very interesting. The content hash would be encoded with the blog post, and could be served a number of different ways.
RE: Decentralization is not binary