i get a prepaid cellphone, i do them all at once with a 10$ card, i got 20k nx, then put your sim card in junk, start over, it cose me, 10$ xD (prepaid sim-cards ftw!!) so i put them into my iphone, mess aways, and get the nx!
Just a warning:
Those offers are essentially run by GPT offer companies in connection with Nexon. How the GPT rules work:
When an offer is completed incorrectly, incompletely, with false information, a temporary or unaccepted email, etc. the offer is reversed. On a GPT website what that means is the money you got paid gets taken back. If you already cashed out you will have a negative balance. However, since you are getting paid in NX, different rules apply here people. The NX won't get taken back you will simply get banned permanently as NX Fraud. So be very, very careful if you don't know what you are doing with GPT offers you probably shouldn't mess with them. It's not worth losing your entire account over 250 NX.