Regarding PRISM cooperation, I'm not sure where your doubt is coming from there.
http://imgur.com/a/wRKtL
The slide was explicit, and is now many years out of date so without doubt the number of providers has increased. The means by which these provider agreements are reached is well known (National Security Letters) as is the fact that organizations are fully barred from disclosing their existence.
Regarding PRISM cooperation, I'm not sure where your doubt is coming from there. http://imgur.com/a/wRKtL
The slide was explicit, and is now many years out of date so without doubt the number of providers has increased. The means by which these provider agreements are reached is well known (National Security Letters) as is the fact that organizations are fully barred from disclosing their existence.