I dunno but that site had a ton of tips and half of them were bogus... I once tried to email them and tell them of a few I had found that were not good.
I was not (and I guess am still not) criticizing the efforts of those who posted what they thought was valid info, but instead, letting them know that some of their offers were not yeilding what was promised.
in one case, Delta seemed pissed off to find out its logo was in an offer it had no idea about (I knew this one reached the top) and I ran into a few, like something involving free auto quotes for miles, that never came to anything. Another clickable link on the MW site led me and others to a closed link on United which said it would give 100 miles just for joining its MP mall, but United said it was very old and wondered how anyone got into this link. No points awarded there either!
Well, maybe they (MW staff) figured out the site was not helping. Too bad. There were some good tips on it--some times.
MM