My blog used to be RSS only, because I thought email subscriptions were a plot of "content creators" and not something readers actually wanted... until one of my readers told me he really recommended adding email as an option. I did, and a surprising number of people subscribed since then.

For a decade or~so I subscribe to newsletters and had skip inbox rules that archived them in a folder about the subject. Eventually I never really looked at the folders but it never bothered me as I don't really see them. Not sure if that means it works or not.