Auto Apply Coupons

Could we please "auto apply" discount codes based on a URL parameter please?

It'd be great to automatically apply a 100% off coupon so that when someone loads the page, they can see the discount applied, but they don't need to manually input the code.

This would be simple – you could use the same logic you use for the "query key" Custom Field forms, and the URL could look something like:

www.mysalespage.com/checkout?coupon=FIRST-FREE

Thank you.