Gas was always a loss leader for most convenience stores. 7-11 took years before they would add credit card readers to their gas pumps. Without them they sold much more by just getting you to enter the doors to pay for that gas.
I've heard good things about Wawa, we don't have them here, but truly it seems most convenience stores don't have a lot of extra room to add too many chargers. We do have Buc-cee's though. They've embraced Tesla installing between 12 and 24 stations at each store.
Truly I'm not sure why the bigger chains like Buc-cee's or Wawa hasn't just put their own name/brand on the chargers. Just take a normal payment at the "Pump".
This is a good point. Actually here in South Carolina, there is a new Buc-cee's that was built near Florence, and they have alot of Tesla super chargers in it from what I have heard.
Also we went to the grand opening of a Spinx in which they put Tesla supercharger at it. It is just a matter of time before they start getting CCS chargers also at gas stations. They said it was great for helping sell the stuff they actually make money on, which is the goodies inside.