Spring NX Bonus

Special sale of NX from 4/30/2012 to 5/14/2012, where, when buying NX over the internet, you gain a bonus amount of NX depending on the ammount bought. The bonuses are:
 * $10.00 to $24.99, you make 10% extra NX
 * $25.00 to $49.99, you make 15% extra NX
 * $50.00 or more, you make 20% extra NX