Supposing the current implementation is extremely successful, it would be the equivalent to signing up for a monthly service with Disney (or Sony Entertainment, or ) : you pay the middleman, who redistributes appropriately to the content creators.
What's the problem here? This month if I want to buy 1 or 20 CD/DVD, I choose how much money I give. With the monthly service model, my entertainment disposable revenue gets converted to monthly preauthorized payments - along with all my utility bills. Not good.