People voting me down, I want to try to bolster my case. I'm going to use QubesOS just as an example because it's fresh in my memory. By no means do I want to pick on them in particular.
I go to qubes-os.org. I don't see "A community of hobbyists who put together an operating system. Join in if you'd like, but you're responsible for what happens. Good luck and have fun!". I see "A Reasonably Secure Operating System". I see articles in the press, all the powerful components under the hood. For God's sake I see Edward Snowden endorsing it. It looks like they're selling it.
I go to qubes-os.org/support. I see "They are not your personal, paid support service. No one owes you a reply. No one here is responsible for solving your problems for you.". This sends a mixed message.
Maybe it makes perfect sense to you because you're deep in this world yourself, and it's just "how it works". But then I would argue you're not thinking about the whole goal of Free Software, which is to ultimately replace proprietary software. Free Software was supposed to give you a reasonably replacement of proprietary software. Maybe without all the bells and whistles, but nobody says "and we'll leave you out to dry if nobody feels like helping you".
Imagine, somebody trusted this great, secure operating system. Suddenly something goes wrong. They post on this high volume community support list. Nobody answers. "But I'm in a total jam now. I trusted your operating system." "NOBODY OWES YOU HELP". You're leaving people out to dry with no recourse. I think people are not thinking of this edge case.
Of course you can get paid support, at worst from a third party. That covers my point entirely from a practical standpoint. However this leaves two problems in my mind. 1) Where _is_ the paid technical support option for (for instance) QubesOS? I don't know if it exists. When and if it does, it would be nice for Qubes to at least link to a few options from their support page. 2) The mixed messaging I described above is still a problem in my view. It really sounds like you're telling people "if we find you annoying we will leave you out to dry". You could at least mention the _prospect_ of 3rd party assistance. I think it sends a different message about how this whole ecosystem works.
EDIT: I guess Debian does exactly what I mean: https://www.debian.org/consultants/