According to the NYTimes they also killed over a 100 CIA assets in China. So we went in the dark for a while as the whole batch was compromised. We didn’t retaliate either. The Snowden thing wasn’t the cause of that but I bet the Snowden thing compromised other assets.
It's interesting how much people still talk about metadata collection (protected behind the requirement of itemized FISA court approval) because "big mean US is evil" while ignoring events like this.