If I remember correctly it started as an email list too, like Craig's list, before it needed a site.
It started out on a service called Linkydink https://medium.com/@rrhoover/the-wisdom-of-the-20-minute-sta...
Holy D*n. I think you are correct, and I was one of the early subscribers subscribed via Twitter Login (only option or something like that).
Holy Dickin'?
`D x n` multi-dimensionality reference?