What do you mean by PRISM collaborators? I am genuinely curious because I feel like I missed when/where that was established.
To my understanding, and please correct me if I am wrong, PRISM isn't a system that companies subscribe to, but more of a government portal for requesting information from a number of companies in a legal fashion. Is this not correct? I admit I have not kept up with all of the bits of information released due to the high volume of speculations generated by just about everyone that talks about it.