Pro Sites coupon $0 for first month on recurring subscription

I want to be able to offer a free first month for any of my levels ( the free trial best I can figure out only allows you to choose one level for the free trial )

I've setup a coupon that sets the first month to $0 on a recurring subscription.
I'm sent to paypal and the message states. First month $0, then $15/month. I enter in my sandbox checkout info, click the final confirm payment button and then am sent back to my site with no new site setup or subscription created in paypal. (if first month is not $0 everything works as expected)

There are other threads on wpmudev that report this should work. Can you confirm that $0 first month checkout is actually working with paypal? Support login is enabled on my site.