It's about gaming the system, or using the rules to your advantage in a way that they weren't intended for. For example - you might collect Air Miles and, havi

It's about gaming the system, or using the rules to your advantage in a way that they weren't intended for. For example - you might collect Air Miles and, having worked out that a particular promotion at the supermarket was worth more in miles than the product cost, got a first class round-the-world flight for less than an economy ticket to the next town.