indeed they do, and that's an often forgotten component of VPN anonymity. by the way... nord also has amazing iphone/android apps so you can direct all of your mobile traffic through their VPN.
When my subscription expires I will look into it. One of the major things that should be mentioned when it comes to VPN's- you have to trust them as they can log everything. Most will not, but there were some issues with larger, popular ones (hidemyass?)
Right now, I use airvpn as I actually trust them. However, they are not the most user friendly VPN out there. In another 9 months when it comes time to pay again, I will take the time to compare it to this one as I actually trust that Σ> has the knowledge to recommend a good company.
In short- if you are reading this and do not know what a VPN is, you need it. Sign up and use it as anything is better than nothing.