Like the sign says"This is the one and only Famous Ray's of Greenwich Village store. We are not affiliated with any other...."
Other stores can call themselves Ray's Pizza. They are not.
You can think they are the original Ray's Pizza. You are wrong.
BTW I ate there once. The pizza was horrible. Much to think and much to many toppings. It is pizza for tourists. If you are visiting New York you can save a lot of money and time and go to any of the other Ray's Pizzas.