There is presently no wording on the Dubai Connect page that says the service is for revenue tickets only.
I have an upcoming Skywards ticket with a long layover (still under 24 hours) where I would have been able to take an earlier flight truncating my time in Dubai to only 4 hours.
I managed to fill in the form and they have "saved" my info. Now lets see what happens next when I head to the airport in a couple of weeks for the vouchers



Dubai Connect - Skywards redemption