I spotted this op over in the Paying Markets Forum at Absolute Write: "We need experienced, published fiction writers to share their wisdom about writing fiction in the form of articles. Each article should be 600-800 words, and accompanied by an exercise that will help master the material. We prefer how-to articles over theoretical ones, and we love articles that make their point with vivid examples.
Accepted articles will be properly attributed with your headshot, short bio, and links of your choosing (not including affiliate links). You will be paid $50 per article via PayPal. We buy first and exclusive digital rights. You retain all print rights."
For more information, see the guidelines page here.