Will they keep doing that, is there a policy about it written somewhere? Have they expressed something about it in a forum or news, just like mint did at some point when ubuntu started with firefox mess and others. I can't find anything from their web site, and on this reddit post, Does Rhino Linux use Ubuntu mirrors for apt packages?, it seems they follow closely ubuntu's mirrors, and if they do so, whatever ubuntu stops supporting on APT, sounds like rhino will stop supporting on APT as well.
This would be very sad at least for me.
Besides !rhinolinux, which is not officially supported by rhino, there are 5 social media mechanisms they support, which I don't have account for neither I want to, and I don't want to subscribe to another mailing list either. Good old IRC is not one of the contact mechanisms supported BTW, neither email (but even if they did, I don't want to subscribe to yet another email list)... Perhaps someone on any of those official communication channels can ask and share what they answer, making a reference to what they answered already regarding repos...