Actually, it's more like...

Twitter wants Facebook's engagement.

Facebook wants Google's moonshots.

Google wants Amazon's ecommerce.

And Amazon wants to sell cool devices like Apple.

All I know is that Facebook really wants me to "friend" my ex-wife.

Adam, that sounds about right. You've distilled their relationship down to four sentences.

And Joseph, I guess it all comes down to what the definition of "friend" really is...!

Rich, thanks.

And Joe, Facebook has co-opted the word "friend", which frankly is quite unfriendly of them.