With Readability you still have to "remember to click" the read now/later button, and you don't get to choose how much you want to support that article; you actually have to support it _before_ you even read it.
I stand corrected. Looks like I was projecting my own thinking on to their system. The closest to what I'm doing was Contenture, since shut down.
If they don't have one already, I expect an opt-out feature before too long. It's the first objection raised to my system whenever I talk to people about it.
At the moment, no. Believe it or not, I've managed to spin an honours project out of part of it (reliable user tracking) and I'm focusing on that at the moment.
In terms of the business model, Contenture was almost exactly what I thought up on my own.
If they don't have one already, I expect an opt-out feature before too long. It's the first objection raised to my system whenever I talk to people about it.