Using the service you paid for doesn’t make you a cheapskate. If I’m on a budget and someone offers me free food for a month, I’m going to eat free food for a month.
Customers in other countries might not have taken advantage so comprehensively (e.g. passing the card around), but this deal basically amounted to “everyone eats free for our first month in business.” There’s no restaurant in the world that could have survived that.
