Coupon in pro-sites for the first month

Hi,

A simple question about coupons in pro-sites.

I want to give a coupon code to a user that allows him to get a discount only on his first payment.

So if I create a coupon code of let's say 10 euros and set "allowed uses" to 1, the user will get a 10 euros discount on his first paypal payment, then he will be charged with the normal monthly fees every time (without any discount), regardless of any expiration date.

Am I correct?

Or is this the expiration date that matters, and not the "allowed uses" ?

Thanks!
Best Regards