"You can pay in more places! Our first version of the Privacy Card worked well for creating one-time use cards, setting spend limits, and locking cards to specific merchants. However, some merchant policies prevented our cards from being accepted online. The new version of our Privacy Cards maintains all of the privacy and security features you love while expanding the places where our cards are accepted."
Google was one of those merchants. I've been using this service for a few years now and it has saved me from so many headaches.