> Almost anyone who has ever maintained popular open-source software, even if dealing with them means putting up a notice that says "Don't ask support questions" and having to delete angrily posted issues.

I mean, that's very obviously a false statement. You don't have to post any notices or reply to or delete any issues.

> My understanding from listening to his explanation is he wants to be able to support users and have an income stream to incentivize that.

That's valid, but is basically the opposite of the reasoning provided in gp comment.