An under-discussed aspect of the Internet.org strategy — which has already been tried in the Philippines, Paraguay and Tanzania — is the "pay-as-you-app" model, which charges users different rates for data consumed by different apps. Thus, while all apps are equal, some are more equal than others, in that Internet.org will subsidize them, while data consumed by other, "less equal" apps will be charged on an individual basis.

Pay-as-you-App: the business model bringing apps to the next billion users.

FreedomPop, the U.S. mobile carrier that offers users "free" mobile services (coming soon to Europe, too), is planning a Pryte-style "pay as you app" feature where users can buy data allowances for specific apps.