Lucky for coinbase is now prepaid credit cards you buy in stores have an activation delay for unknown reasons, here it is a 3hr delay and they don't bother telling you except for tiny fine print, and everytime you try to use it before delay is up, it resets all over so seems like your card never works.

So if people are still buying PPD cornerstore visas then they'll wait for bitcoins, especially since bitcoins are used for niche items like drugs (lol), VPNs/hosting, speculation or cheap remittance