Huh, if I hadn't logged in for a week or so, I'd log in and look.
Not something I'd even have thought of being a 'thing'. Eh, if some people find it useful... I was just unaware it even existed.
Where even is that on the site? I've never seen a link or reference to it before... and searching right now I'm not finding any mention of it. Makes me wonder if ghostery is telling some part of your scripting to bugger off, or if it's being blocked as a false positive for an advert, or something...
Type of thing I'd expect to be in the sidebar on the right... but I can't even find WHERE you'd sign up for it.
Basically if you have one, not only have I never seen it, I can't find where it would be... also rather than mailing it only, a static copy of it (and past 'issues') on the site would be something to implement as well.
Particularly so you can send a text-only copy for those of us who's mail servers use HTML e-mails as a weighting for spam filtering. Or the real nutjob extremists like myself who thing HTML e-mail is something that should NEVER have been allowed to exist in the first place, and should be inherently blocked by all mail servers.
-- edit --
I just quadruple checked, there is no link, form, nor mention of a newsletter to be found ANYWHERE on this website! Well there's your problem...
You have it buried under settings, so unless you go through every last detail of the settings (which most people just gloss past) you'd never know it existed. With the ONLY mention of it being on a page of checkboxes I would out of habit just automatically deselect all of them out of utter and complete distrust, I likely would never have known it existed without this thread about the topic. Probably why j never noticed there was one either.
You want more traffic on it and more interest, you gotta pimp it!