They definitely are not stealing deals from flyertalk. I set up IF notifications on my phone for all new blog post deals and new MR posts. 90% of the time a deal posted on a website will not appear here. And the ones that do show up here I think are often times sourced from one of those sites. The MR forum is still good for people who want to do true mileage runs, but I think the deals on the websites are more geared toward deals that the average consumer would use.

this is what I follow:

http://www.theflightdeal.com/
http://www.secretflying.com/usa-deals/
http://www.fly4free.com/
http://www.airfarespot.com/
http://www.dansdeals.com/ (airfare is a small focus of this one)