MickiQ
In My Defence I was left Unsupervised
I've only been to the US twice (and both times to Florida) so perhaps not the broadest of samples but all the gas stations I saw were pre-pay even then (2001 and 2010). Here in the UK pre-pay are a minority but they do exist.Since the cost of gas went up, all I see is prepay gas pumps. The clerk where I get gas said they were getting multiple drive-offs a day.
Costco is pre-pay at the pump (there is no kiosk) and at £1.81 for a litre of diesel it's actually worth the 20-mile round trip rather than go the 2 mile round trip to the local BP at £1.99 per litre.