How is this sustainable, though? Are "points savvy" travelers really dumb enough to read this stuff? Surely at some point, it goes the way of "National Enquirer" (is that even still published?) - that is, devoid of credibility.
It's probably sustainable because all of the people who got credit cards through their affiliate links are probably trying to get the "carefree travel lifestyle" experience that TPG is also pushing along with the credit cards. That's probably the target audience of their stupid "5 ways to not get kicked off an airplane" style lists.