In years gone by, I submitted five article ideas to AMA and two of them saw publication. Model Aviation pays a reasonable amount on acceptance. Other magazines I have written for pay on publication, so you may wait a while for your money. I would suggest you give it a shot if you have anything to contribute.
Bob Hunt's column is occasional, as are the other CL columns.
On an aside, I really like Flying Models. It covers the waterfront in a way which suits me. There are always stunt and combat columns and various construction articles, CL included. I even read their couple of ARF reviews, which actually have useful information. Flying Models is a commercial magazine, which, one presumes, makes money. I wonder how Model aviation would fare, if it did not have a captive receivership (no, I didn't mean readership.)