I heard about a GlobalPass that allow us to legally triple dip buying a air ticket.Went there and found that's true. Example:If you want to buy a ticket in your favorite Airline(UA or CO) and use their booking engine(the price is comparable to travelocity, expedia, etc..) you will: 1) use your credit card to get miles;2)earn segment miles in you FF program(UA or CO) and earn 4 miles per dollar spent on GlobalPass program(you must register as of GP member) to earn your GP miles.

I will try this!!!
www.globalpass.com

M101