Yeah, traditional Spinner Racks aren't really going to do much. I say that as a Twenty-Six year old who primarily bought comics through them as a child/teenager. They were basically the only place to get comics if you lived in a small town without a comics shop or bookstore. Comixology makes then obsolete. A 10 year old is more likely to have a device they can read digital comics on than they are to be intrigued by expensive magazines at the corner store.
Strategically placed displays of collected editions might do well, but floppies don't make for a lot of impulse buys.