Fate Codex is open for submissions. Rate of Pay is 5 cents/word. Though admittedly my-own, "Fate-Fu" is a bit rusty... Especially in regards to creating content, I 'm thinking those better versed than I (which is just about everyone) might consider it. Judge me if you must, but I can count on one hand the times I've played Fate, which isn't conducive to the idea of writing content for Fate.
A link to the submission guidelines an in-web pitch page is: here
A link to the Patreon is: here
The drivethrurpg.com page to check out the various issues of the Codex is: here