From now until January 11th - 11:59 PM PST, all purchases made with PayPal will receive an additional 20% G1C bonus instantly! That means if you buy 4,000 G1C you'll receive 800 bonus G1C! Just think of all of the cool stuff you can get with all of those extra credits!
There are no restrictions on how much you can purchase so stock up before this deal is gone!
* Any PayPal payments initiated through third-party sites such as Steam, Amazon, and UltimatePay are NOT eligible for the bonus. Only direct GamersFirst.com PayPal payments qualify.
PayPal Payback - Get 20% G1C Bonus instantly!
Source: Steam Community (opens in a new tab)