This. If Mark wanted to do something altruistic, he would not whitelist good sites, he would just blacklist Netflix, YouTube, Spotify, and others. If expensive

This. If Mark wanted to do something altruistic, he would not whitelist good sites, he would just blacklist Netflix, YouTube, Spotify, and others. If expensive bandwidth is what's limiting him, he can work around that. But this isn't an altruistic move. This is a business move.