Think you nailed it on the head with your example - with food, you're fulfilling a necessary contract with your body. You have to eat, and even if the pizza is

Think you nailed it on the head with your example - with food, you're fulfilling a necessary contract with your body. You have to eat, and even if the pizza is terrible and you're unhappy with it, you've satisfied the necessity of eating. With the app, not only are you out a few dollars, you potentially commit the sin of wasting your time by not fulfilling any desires. Though the upside is exponential (in relation to the food), so is the downside.