We periodically issue a coupon to give you a quick look on our new template, or on special days. If you have a coupon, luck you!
To use your coupon, and get access to the template, go to your account page, and locate the "Theme coupons" menu.
You will be able to find the input where you'd type your coupon code. If your coupon is not active, you may have already applied it, or the code is not currently available. Hope this helps!