From their announcement:
As part of our research into purchasing practices in this industry we are looking for input from tabletop gamers regarding what it is that informs their purchasing decisions as well as some demographic information.
The demographic information is optional but we are offering two random respondents a $50 gift certificate to TheWarstore.com. If you are interested in winning one of these gift certificates we will need your email address. This address is not going to be stored, resold or used for any purpose other than notifying the winner(s) of their prizes.
You can view and participate in the survey here.