Yahoo is also a participant in PRISM, and fought as hard as they could against it in secret court. https://www.wired.com/2014/09/feds-yahoo-fine-prism/ https:/

Yahoo is also a participant in PRISM, and fought as hard as they could against it in secret court. https://www.wired.com/2014/09/feds-yahoo-fine-prism/ https://www.wired.com/2014/09/feds-yahoo-fine-prism/ I think it's safe to assume that all companies involved in PRISM aren't happy with it and tried their hardest to fight it.