Here's an interesting article from the world of economics about how much we like free stuff. The article provides many examples like this one: "Some time ago, Amazon brought the free shipping idea to Europe. By mistake, though, the price in France was reduced to 1 franc (equivalent to 10 cents) instead of to zero.

While the European countries with free shipping saw a dramatic rise in total orders, not much change occurred in France. Even though they only had to pay an incredibly small amount. What's the big deal with 10 more cents? Isn't the difference so small that it shouldn't matter? Yet, according to a study by psychologist Dan Ariely, the appeal of 'FREE!' is huge."

The article concludes that "when given the option to get something for free and its cost is zero, some fairly wild consumer behavior takes place."

Possible Preaching Angle:

Well, except maybe when it comes to grace—that seems a little too good to be true. Or is it?