Hi. I am currently doing a quest (a reader driven interactive narrative) on 4chan's /qst/ board. I figured a good way to find interested participants would be to advertise at the hub of the Cosmere fandom. It is currently running right here: https://boards.4chan.org/qst/thread/1047081
The pitch is a bounty hunter during Era 2 of Mistborn is going to a town named Crowther to try and find revenge.
Here is the first Thread so you can read it and see if it interests you: http://suptg.thisisnotatrueending.com/qstarchive/979396/
And my twitter where I post when the threads are live: https://twitter.com/WhistlerDM
Thanks for checking it out!