Yes, they're on Patreon proper. Patreon isn't constrained to entertainment.
> Any links to coder patreons I can look at?
A few I know or Googled:
- https://www.patreon.com/bcachefs - Works on a new filesystem
- https://www.patreon.com/cemu - A WiiU emulation project
- https://www.patreon.com/ShareX - An open source Windows application for sharing stuff
- https://www.patreon.com/evanyou - Works on Vue.js
- https://www.patreon.com/alanstorm - Works on lots of open source stuff in the PHP community
There are a ton for game projects and such.
Just go to Patreon and search for "Open Source" and you'll see a bunch.
I just opened it a couple of days ago, still have to polish the story and probably be more active on social media (I don't have Twitter, etc... I really despise Twitter but I kind of feel I am missing huge opportunities to get visibility...)