You want Wi-Fi with that?
I think so. it gives them an edge over any other restaurant that “might” have WiFi, and by making it free across the board, it helps establish them as a destination.
As a little kid growing up in a one well Indiana town (that did not have a McDonalds until long after I had graduated college), I recall our car trips with regular stops at McDonalds because they had bathrooms and were not jerks about us using them.
They also had cheap food, but I remember my parents packing soft drinks in a cooler and buying only the hamburgers and fries. We’d eat outside so we could drink our own drinks.
Ah, the benefits of growing up poor !