I found a $50 gift certificate in my spam folder today to use at GEARSHOP. It said I received it for building a gear list there. They also sent me a survey this week to earn an additional $10.
After I emailed them for clarification, I received this response:
The $50 GearList Credit is valid until October 31, 2013. The code is a credit
for creating a gearlist and is a valid payment option towards a camera (compact,
compact system cameras, dslr) or lens. Accessories aren't included.