I have published three classes so far here on Skillshare, which are in the Craft category. As an Indie Author, I am currently working on a series of classes for the writer who wants to turn their knowledge into nonfiction books/eBooks.
My earnings to date have been minimal, but seeing your numbers gives me the incentive to push forward on another area I have a lot of experience in, which is writing. I am going to start with sharing my free links to my craft classes on the Facebook group you mentioned, which should give me some new enrollments.
I'm looking forward to seeing my enrollments and income increase. :)