Here's why that may be controversial.

https://www.washingtonpost.com/news/the-switch/wp/2016/10/06/facebook-is-talking-to-the-white-house-about-giving-you-free-internet-heres-why-that-may-be-controversial/

Just remember how well that went over in India. Even they didn't want a castrated internet (ala AOL) for free. Sounds like they've candy-coated this turd.