I mean inefficiency in terms of "an inefficiency in a market is a business opportunity". This inefficiency is in the process of being filled by the big players.

I mean inefficiency in terms of "an inefficiency in a market is a business opportunity". This inefficiency is in the process of being filled by the big players. Dropbox cannot survive as just a file sharing app in the face of bundled software from companies with deep pockets. Apparently they are fully aware of this as shown by their efforts to evolve into something more sustainable.