Why doesn't the shop have convenience store gift certificates?

I bought a convenience store gift certificate at the shop a while ago, but looking at it again now, there are listings for Unnie Deal coupons, but no other coupons like convenience store gift certificates?

I don't know if I just can't find it, or if there was no notice at all.

Please let me know if you have decided to sell only Unnie Deal coupons. There are only products I don't even use, and I was happy that I could at least buy a convenience store, so this is absurd.