I think fine grained insight into what an intelligence service looks like on the inside is enough to compel people to change their behavior. I know for me, I was skeptical of claims the NSA even could do half the things people were purporting they could do, and having confirmation like this was the real game changer.
Aren't email and phone calls monitored anyhow since they're not encrypted (by default)? Why wouldn't the three-letter agency capture all email traffic if it can?
Of course this is not the case, many companies are invading our privacy for commercial reasons, they sell our personal data for their own financial profit (Google, Linkedin, Facebook, etc.)
We have always known private companies keep all the data they can get their hands on and use it to sell ads.
i think many people (around me) have become more privacy aware because of Snowdens disclosures, which i think is a good development, even though no matter how hard they try they are still not protected, and probably never will be, from three-letter agencies collecting their data...