You're forgetting that for all the Snowden leaks have revealed, the info in the press about Prism is still classified. IANAL, but I would imagine Apple could ge

You're forgetting that for all the Snowden leaks have revealed, the info in the press about Prism is still classified. IANAL, but I would imagine Apple could get smacked quite a bit if it started talking about its cooperation (not necessarily voluntary cooperation, that is) with NSA initiatives like Prism. I mean when the wikileaks cable dump came out, there was quite a bit of noise about how US government people should not visit the site because it would still constitute a breach of security even though it was in the public domain, and that they could lose their jobs for it. This is no different, really. The material is still classified whether it's spread all over the press or not, so discussing it with uncleared persons such as the public would (IANAL, again) I imagine be a breach of security.