It used to be actual FOSS but then they went down the route of making it nonfree.

I sort of get why, but not really a fan of how they went about doing it (and arbitrary "revenue-based" thresholds really don't work for businesses that operate on a commission/agent basis - you can have a massive turnover but huge cost-of-sales - it's a very blunt instrument). For that reason I've kept self-hosting the older, actual-FOSS versions and they're just sat behind auth. I've not looked at alternatives yet but would be interested in any suggestions