I've been at Examiner since 2009. I added two more columns since then.
Ironically, I actually don't publish very much. I have one column that does pretty well that I try to publish at least once or twice a month, a second column I've pretty much given up on, and a brand new column that I only started to get access to certain types of events. (I'll be publishing more in that one as I attend the events).
The most I've ever published was 5 or 6 articles a month. I never was one of those Examiners who could churn out multiple stories a day.
The main column I write is the "Michigan Firearms Examiner" and I've figured out how to make it worth the effort for me. The first thing is I've learned to promote it to get enough hits to make enough money to keep up the effort. I post links on several gun boards where I've been a member and I get most of my hits from those sources. Google doesn't do much for me anymore since the last two updates.
To give you an idea of what I consider "good enough to stay" I have about 85 articles published, so there's not a huge back library bringing in hits.
I published one article in June and between it, and the small amount of hits from my archive, I made $78 in June.
I just published an article about a week ago and so far I'm up to $44 for the month. (Jumped from the $7 or so I'd earned from the archive before I published that article).
For me the only reason I get any readers is the promotion I do on those firearms forums. I do have a few subscribers, but most of my readers are first time visits. Looking at my GA stats I see exactly which forums bring in the most visitors and I make sure to promote there first each time I publish.
I also do get readers who repost links for me on other forums where I'm not a member. That helps a bit as well.
I also now try to spend more time writing articles based on my own knowledge base instead of traveling to cover local shooting events, political events, etc. I found it just wasn't worth the effort to travel, cover an event, and then write the article for typically less than $20. (Many of those were gun rights related political events and those articles never do as well as my more "how to" shooting tips articles).