Fuel discount programs make sense. So I signed up for the Escapees new program, especially hopeful to use the gasoline benefit for my cars.
But before you sign up, consider downloading the app and checking out what is available in both diesel and gasoline in your area or the areas in which you intend to travel. (I have found no way to uncover this information other than the app and the support people do not respond to information requests or email)
In my particular case I discovered there are zero gas stations within 200 miles from where I live, and only a few places with diesel, and none of them are big enough to accommodate a motorhome.
So for me, the fuel membership card was a total waste of money.