Yes, I have build blogging website, gem based theme in Jekyll.
Great, did you publish any commercial theme? I'm using Jekyll for some time now, and I would like to create a theme for commercial use. What do you think about a market for Jekyll?
What do you mean by commercial theme? Do you want to create a gem based theme and sell it?
Regarding the market for jekyll, I am not sure. It is just an simple static site generator.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.