Why would they do that? Are the miles really worth it, especially these days?
here is a wild one...
flying to Hawaii BACK TO BACK
http://www.flyertalk.com/forum/mileage-run-deals/1444131-mr-mon-fri-ua-ewr-hnl-ewr-x4-415-00-x4-4-1-cpm-39-616-miles.html
I have used that site to get fantastic deals on airfares - but I can’t do those crazy mileage runs