Nights and miles are the metric to separate out "high spend" customers, up until you establish a nights/miles metric and you encourage customers to game it...

Nights and miles are the metric to separate out "high spend" customers, up until you establish a nights/miles metric and you encourage customers to game it... I can see where he was going with the analogy to Gresham's, but maybe another G's law is a better fit: https://en.wikipedia.org/wiki/Goodhart's_law https://en.wikipedia.org/wiki/Goodhart's_law