I think it's an interesting idea, but they won't be interested in a site this size. thenewgreen and I had some casual chats with media companies a couple of years ago. It was pretty clear that big numbers are what they are interested in.
Big numbers aside I wouldn't necessarily need there to be a discount on the newspaper/publication subscriptions that hubski would negotiate for me. I need a tool to deal with the login/pwd, email connect, spam, user preferences, and privacy and change pwd after six months etc etc bologna that comes with trying to pay and consume current event these days. An "a la carte" menu that let me choose which newspaper/publication I would be willing to pay full price for ... and I would pay hubski a small fee to negotiate the identity of the reader/user on that newspaper's website. Any additions or subtractions would require a fee paid to a patreon-like account somewhere to hubski (edit: clarification). I could then pay hubski again if I wanted to assume the full roll identity of the user hubski created for me. Just a thought.