Thank you for all of these awesome ideas! You really gave me a lot to think about. I could definitely expand upon the world lore and there's lots of information to share with those who are interested. Writing short stories based on prompts or my own scenarios is definitely doable. And you're right, I think it definitely makes sense to not force rewards and keep the tiers simple.
I started to create a tumblr for The Azimuth Gap, but I never finished. I'm very bad at social media...
I am considering writing a high-fantasy VN that would require less custom assets that might allow me to build a reputation and gather an audience in hopes of developing interest in The Azimuth Gap.