I understand that there are fees for plastic tranactions, and the stations are working on a low profit margin. The buzz around here is, you can use plastic in Mickey D's, Dunkin Donuts for a cup of coffee, or Wawa, 7-11, Quick Check, and not have tiered pricing.
The $50 limit I have not come accross yet. A guy with a cigarette boat was in Exxon station gasing up & he was well over $500 on the pump, & still going.
I'm not saying the tier pricing is wrong, and it's nice to get a 'discount' for good old cash, & yes, profit is what the guy is there for; but I guess we (NJ) are used to one price, like it was.
And with all the 'extras' the merchant gets from the plastic, as you stated above; those values should equal the $$ differences.
