[gandalfu]

Telcel in Mexico allows unlimited access to Facebook and Twitter while the rest of the internet is bounded by whatever data plan you have.

Not sure if Facebook and Twitter pay Telcel for the bandwidth you consume.

[artenix]

It's known that Zuckerberg is approaching some not developed countries to do that. India is on the top of my head. And this has been categorized as a practice againts Net Neutrality. Chile, IIRC, banned it.