One of the big problems with Examiner.com is the staff has never really known how to put together a content site. I think it was a good idea that went really bad once they decided to become a content mill and go for quantity over quality. Even then, though, the big problem remains a staff that just doesn't understand the web.
Pay tanked because of Panda, and instead of doing what many of the smart players in the industry did -- purge bad content, remove duplicate content, concentrate on higher quality content, etc. -- Examiner.com tried to double down on producing more and more low quality content.
Because Panda establishes a basic rating for a site and applies it to the entire site, quality work for Examiner gets dragged down to the bottom of the search ratings because there is so much poor quality.
At one time I was making $500+ a month from them mostly from 'evergreen' content that required little new material each month. Nowadays it is around $50 a month. That drop has been entirely Google rating the site poorly because of all the bad content.
I'd definitely stay away. I doubt they'll ever learn how to run a decent site.