If everyone was more privacy conscious in the Internet, the NSA and other agencies that do mass surveillance would not be able to target, well, everyone. That'd be the end of mass surveillance. Therefore, it's probably better to be a little privacy conscious and use services outside the USA whenever available, for two reasons:
- if the economical impact on the US economy is bad, the gov would have to rethink things
- it makes it harder and more expensive for the NSA to spy on you
Ultimately, trying to hide from the NSA is pointless. If they actually want your information, they'll get it. But making it impossible for them to do mass surveillance is a whole other thing. And an important one !