This may be a good idea and it may not be, but I'll throw it out there. I thought that, as a one-time thing of course, we could each put a link to Vortex in our next chapter subscription message. We have five ongoing fanons between us and it could add some good exposure (especially when we're already doing the newsletter promotion and we have a new villain in the mix.)

Example:

"IAE/SHiE/Air/DSV/HotN Subscription:

New chapter's out. Here it is!

Oh, and while you're waiting for the next one, here's Vortex, a fanon-crossover story that I'm working on with some other authors on the site."