nope, that does not help you subscribe without posting 'subbed'.
You had said: "writing 'subbed' doesn't subscribe you to emails."
I said, But it can, if you tweak your options.
That is, after that, writing sub *does* subscribe you to emails.
In case we are confused, let's repeat: "Posting sub subscribes you to emails, and I showed you how."
So, I don't understand your new objection: "that does not help you subscribe without posting 'subbed'."
okay mis-understanding... what people posting 'subbed' really want to achieve, is being notified of new replies without getting emails.
you can't do that any other way.