Have a coupon code you want to use when you activate your Traktivity subscription?
You'll apply this on your Billing page, within your Profile. As you're setting up your account, at the same time you input your credit card and billing information, you'll see a Coupon Code field. Type in your code here, and when you see the billing confirmation, your discount will be applied. Easy!
On your account page, under Subscription Details, you'll be able to see the status of any coupon code you've used.