@deathmtn @richlitt The free tier should allow you to do everything you can do on gh-pages and quite a bit more. Certainly would cover your custom domain, https and build automation needs.
More advanced features like form handling and split testing are also free with a nice high ceiling.
My tweets and posts live here on my own domain these days.
You can explore them here and follow me on Mastodon instead of Twitter where I'm not currently active.