The reason why is most likely that of how many native speakers there are, or just that of their society, and development.
Like China, although having a lot of internet users way more than any country around the world, they only follow their own path, having their own Google and their own YouTube due to the communist party.
While many other 3rd world countries, most of their people won't have access to the internet as usual, because of lack of electricity, poor infrastructure, and many more factors.