Naturally-- and no one is complaining this is unfair--Microsoft also demands reciprocity of contacts. They say, in effect, we'll show you our Hotmail contacts, but you have to let your users share theirs when they sign up for Microsoft's Windows Live services.
...
"Microsoft is the anti-data-portability company."
Seems to be the opposite to me.
I think the complaint is about everything other than this detail, such as forcing startups to use Messenger exclusively and give MS first shot at search deals.