Submitted the github link because I couldn't find it from their marketing site: https://killbill.io/
1. Started at the homepage, clicked "Start Now" at the top right. It lands on a page called /download/.
2. The word download is nowhere to be seen on that page, but, the third box in the row is "On premise", and has a "Select plan" which redirects to https://github.com/sponsors/killbill.
3. We land on the Github sponsors page for the org. The repository is listed below.
Yeesh, that was a trip of obfuscation.
But yeah, not emphasizing their GitHub page is an interesting choice, maybe they figure that their audience isn’t developers? Although many of the reviews are from technical people, so that doesn’t make sense either.