Within the similar timeframe I've always encountered the three-step process: you go inside and pre-pay, back out to pump, then back in to get your change (if you didn't just load $20 onto the pump and use it all, anyway). Even the 'pay inside' button on the pumps just flashes "See attendant" on the screen. Same when I worked at gas stations during the downturn. The only places I've ever found that'll let you pump before paying have been the most rural lil independent stations. Gotta love the varied experiences across this bigass country.