Earlier quoted context omitted.
Facebook also owns your social graph and that is what they exclaim proudly about the most as well. If any other service wants access to it they have to ask Facebook and they can't just take it. And if there is no Facebook integration, then theres an additional level of friction in getting new users. It's definitely a tough market to breakthrough in because of Facebook (Ask google).
> Facebook also owns your social graph Any email provider also has your social graph. The only problem with email is that it is seen as "old" compared to the "new" of Facebook and Twitter. Something else will come along and be the new "new" and that will be the end of Facebook.
They really don't. Not the way Facebook does; not for the post-Millennials. People email bosses and professors and acquaintances; they use Facebook for friends.