oh fuck they're basically saying
"Hey you're free to use our services, but we get paid by the NSA to allow them to view and use all of our data"
Well not really, but since Skype is technically allowed to record/use all of your data and they have an agreement with the NSA(I'm not sure which agency but it is there) to share it with them. Microsoft also has this sort of ToS can't remember what it was about though