Where are these ads on my lock-screen coming from and how can I get rid of it?
I just experienced the same thing, although with a different coupon and app. For me, it turns out that it is coming from the 'Wallet' app. If it is, go to the 'Wallet' app, click on the coupon, then the 'i' on the bottom left. You can select 'Remove Pass' and that should get rid of it.