The next step is having to wait for the ad to complete before the gas will pump. "Premium" gas station membership for a fee will provide an ad-free experience, for now, but eventually it will come with ads too.
One time I put in my card, but the pump couldn't show me an ad because it crashed. My card was stuck in the pump. The guys inside tried resetting the pump but that didn't work, so they said it'd be a week before someone came around to fix it. I had to cancel the card and get a new number. All because I couldn't watch the ads.
I've never seen one in Australia. We don't really prepay for petrol here. Some servos in the dodgiest suburbs do make you between certain hours, but I've never seen one that makes everybody always prepay or one that actually takes your card. Most of the time you'd go inside to prepay anyways, but on the few pumps I've seen that do have card payments on the physical pump it's either tap or swipe, no insert, and no holding cards hostage
I’ve been to many a pump that instructs you to insert and leave your card, then ‘latches’ onto the card once you’ve inserted it, locking it into place until the authorization for the transaction is complete. I’ve seen them in Florida, Georgia, Oklahoma, Texas, and Louisiana.
Costco has no ads for the time being, and I can’t see it going with ads because they can only slow the sale of gasoline that people already line up for after paying to access the ability to buy it.