It sounds like you've said not that scarcity exists in the supply, but rather than a limited amount of demand exists. That much certainly seems true (consider YouTube's statistics on how many days of video get uploaded per minute). However, I don't see how that leads to the conclusions you suggest; it certainly doesn't have the same effect as scarcity of supply.

> The question is, should I as the creator of the information be able to capture all that value? Some of that value? None of that value?

You have the right to try; you don't have any fundamental right to succeed, but you can certainly try.

I agree with the concept that you create value when you create new information, rather than at some later time. That seems like the perfect time to attempt to extract value, since you can choose not to create the information if you can't get value for it, and you can choose to focus on creating information for which you can derive value.

That model fits nicely with systems like Kickstarter: raise money to create something, then create it. If those become the primary model for funding creative work, they'll almost certainly attract more interest and more funding, which would otherwise go to copyright-subsidized creativity. Seems to me like a pretty reasonable model. Other sensible post-copyright models almost certainly exist; people just haven't thought of them yet, or haven't demonstrated that they can succeed.