It is just like overland routes. Imagine you have a bunch of delivery trucks on a highway and you are paying tolls along the way. At some number of trucks it ma

It is just like overland routes. Imagine you have a bunch of delivery trucks on a highway and you are paying tolls along the way. At some number of trucks it makes sense to just pave your own road next to the highway. FB is planning 10-15 years ahead because Africa is the next part of the world that will develop a middle class.