Its either 1:1 or its not. In this case its not. And with good reason: As casascius already said, its about sustainability. Something I completely agree with as being justifiably necessary. Aside from this, the reason is irrelevant to the fact -- if its not 1:1, and casascius never suggested its 1:1, then I don't see why the point to argue that it is 1:1 or even 'sorta' 1:1.