I'm still having a nightmare with this. It won't work.
I've deleted the view I set up and will use yours instead.
This is what I have so far:
Views: Category Page: coupons (the one you set up and the same as the one I tried earlier)
use request url
Products added by subscription
Inserted code: [DFR:coupons?]
Please help me as I think I might end up jumping out the window....