Just to nitpick. From a technical point of view, there is indeed a difference. 10GB of Facebook traffic can go through an internet exchange that my ISP is tied

Just to nitpick. From a technical point of view, there is indeed a difference. 10GB of Facebook traffic can go through an internet exchange that my ISP is tied in to, straight to Facebook's servers. Traffic to smaller players will have to go through my transit provider, and I'll have to pay for it.