They are all over here in Michigan. They’ve been here for many years. SuperAmerica owns them or co-owns them I believe. Marathon is the parent company.
They are so common here, there is an intersection a few miles from me that has a Speedway across the street from a Speedway. (And I’m not joking) LOL. It is a major road though, so one gets eastbound traffic and the other gets westbound customers.