@domdomegg If I understand your comment correctly, you're saying I can remove the list of domains and instead just add the .pencraft class. I don't want to do that because it's possible some non-Substack websites will use some of the same class names and I don't want to potentially break those sites in ways that could be hard to debug.

Yep, that is my claim. I agree there comes some risk of breaking non-substack websites, but the trade-off of having this work reliably on many different custom domains is worth it for me, and I see it as very unlikely that these specific filters match again. But fair enough not updating your overall filters, can understand this is a trade-off :)

Seems they updated the css a bit, or maybe since I'm using adguard the filters need to be different, but this works for me now:

##.pencraft [class*="subscribeDialog"]
##.pencraft [class*="background"]

@evfrenkel Thank you! They do indeed seem to have updated the CSS. I've incorporated your changes.

For anyone who subscribed to the comments in this thread: I've moved this Gist to an actual GitHub repo now, with a generation script, and cleaned out the old rules that didn't seem to do anything anymore: https://github.com/riceissa/ublock-origin-substack