If it was physically mailed, it would be something a bit more special.
On the other hand, if the newsletter is the equivalent of an email simply copied and pasted into MS Word and then printed and mailed, people might view it as something throwaway and low value.
>If it was physically mailed, it would be something a bit more special.
A counter-example to this is: physically mailed junk is no more special than emailed junk. It's even more irritating.
I think the goal is to write content that would at least survive the bin, at most entice people to have it in physical form.
One way to test your hypothesis is to do make digital content, with an option to print it beautifully, not just the browser/HTML print, but a button to download the nice printable PDF. Tracking the percentage of people who find the content interesting enough to want it as a PDF tells you something. The percentage of people clicking to print the content tells you something.
I think this could be a first step to answer your question.
Maybe having a field for an address and asking people if they want to receive the content in physical form can shed some light on your answer. Maybe you could also send a binder with a distinctive color/logo so people know where to put your newsletter, and it creates a "thing" where people share photos of their binder.
It could be a part of a ritual where recipients wait for your newsletter, it arrives, they read it, and they carefully put it with the previous numbered issues.
Maybe you can send colored paper according to the season (spring, summer, autumn, winter). People could build collections.
Maybe you could do themed according to geographic locations, and maybe you could be inspired by philately and numismatics. People could share issues, or borrow issues unavailable.
But am not from Canada, fyi.