Even then, what's the issue? Just because something is available free if you search hard enough for it doesn't mean the creator can't or shouldn't charge for it.
Because $250 to see some content that is of value to you is reasonable. $250 to get an email telling you that the latest instalment of a series that is available on a public channel is not.
No, but paying - and thinking of it as paying, rather than donating - that much for a service that youtube gives you already for free (at least, I'm amazed if there isn't an option for "email me whenever this channel uploads a new video") would seem... odd.