I don't like the name, "Travel Hacker Cartel." It makes it look like they're engaged in something illicit, or see themselves as appealing to people who are willing to do so. I believe the things I do and most of us do for miles are completely within the rules of the various companies offering them. (An exception may be the way some people work coins from the US Mint.)

I personally can't imagine paying that kind of money for information that is available for free here. Think about it - if they actually came up with anything new that the experts here didn't also have, it would get posted here too right away.