The zero-rating mentioned is where the carriers don't charge customers for the data access to those services. This is commonly advertised in these countries along with the cell phone service ("Free Facebook!" pops up a lot in the Philippines, where people often sell sim cards on the street and many small general stores recharge cell phone plans -- adding some marginal pesos to your cell phone is often a pain). Pretty transparently not net neutrality, although if you are moving them from can't-afford-any-sites to can-only-afford-facebook, it's hard to see that as a bad thing, at least when you isolate it from the game theory / market capture elements, which are potent.