How does this effect foreign users of these services? I mean I'm pretty sure that they haven't restricted their data collection to US citizens. Is there international law about this?
Uh, the NSA's primary mission is to conduct data surveillance on foreign entities. The reason why PRISM exists is that much of this data flows through American companies' servers.
Of course. Just surprised that EU politicians don't take the chance to gain some popularity by screaming that they're angry at the US.