I've found that most bloggers think that 50k is a "limited time" offer. Few of them want to say that you to go to FlyerTalk to find better offers than the Citi / AA sites show (and they usually show just 30k or so).
Most bloggers don't even know (or at least don't publicize) the awayN/travelN/milesN trick of finding them without going to FlyerTalk, because they get commissions on promoting the "official" link.
So the bloggers will probably shut up once the 50k offer goes away from the main Citi page and from AA's main page. I don't think they can get commissions on awayN/travelN/milesN offers!