Ah, I guess it would make sense if you were only looking to use them on domestic travel. What is the turn around time... Say I buy a refundable ticket today... how quickly can you cancel and then receive the e-cert? Just wondering if anyone can confirm that this has worked for them?

Seems like a pretty big loophole to me if this actually works. I know that many deals like the mint can handle large amounts of people doing the deal, but any fears that if this does work that it might quickly get shut down. This basically allows people an easy way to earn MQMs and skymiles on what otherwise would be award travel.