To be fair, it looks like he’d be much happier writing proprietary software in the first place. His goal is evidently to get a source of sustenance first, and to help the community with code second if at all. And in proprietary software it’s already customary to expect no support whatsoever (sometimes not even patches to existing, already paid software) unless you pay for the privilege.
I don’t know, I’m an open source dev too, but my time is valuable and I can’t (and won’t) just work for free on dozens of bug reports from a user that don’t want to investigate first by themselves.
Yeah open source is great, but if you want support you have look at the code and read the damn documentation first ; I lost a lot of time just directing users to docs because they can’t read.