Not necessarily.
Kroger here (who owns HT) has a deal with Shell where you can use Kroger FP's at participating Shell stations.
However, that does not mean that you get Shell if you go to the Kroger gas station.
You are going to get whoever is the low bid at a given point of time.
Around here, that probably means Marathon or Sunoco, given that they have the two closest depots.
Doesn't mean it's bad, just means that it is a commodity.
I've used it. Many people have used it.
It works, if the price is right.