How do I see how much affiliate credit I've accumulated?

If you click the "Account" tab at the top right of our site, a little way down on that page under the heading Affiliate Credits, there is a line saying "You have $XX.xx available to redeem."  That dollar value is how much credit your DriveThruRPG.com account has currently.

For more detailed information, you can also visit the "Affiliate Reports" tool page.