Is getting free NX cash legal in the US

It is very legal, and there are plenty of websites that allow you to do this. The best one, www.freenxcodes.com, gives more nx faster. You can get 10k nx within an hour if you try. They require no personal information, although I suggest you make a gmail account as you will loaded with spam in your email. And best of all, they email you the nx card codes, so you dont have to wait for it in the mail. It normally takes up to a few hours to receive the code after redeeming it, which is faster than other sites.

Also, if you use this link http://www.freenxcodes.com?join=41099, you get a free hundred points when you sign up!

Hope this helped and good luck getting your free nx