Based on feedback from two of my successful maker friends (hi there @flschweiger & @deltabadger !), I decided I should just open up my signup page and reach out to people.
So I did.
I thought I would have to implement support for Hugo & Eleventy templates, but turns out I was overthinking. I already had strong Jekyll support, and Jan & Frederik both pointed out that I could start reaching out to Jekyll users.
Obvious, right? Well, yes it is, but for some reason, I couldn't see that at the moment.
The moral of the story: have two successful IndieHacker friends that talk sense to you when you're being stupid.