Not sure if it applies in this case, but marketers and influencers have discovered that if they sign up for Harvard extension classes, they can publish blog articles and do email with the harvard.edu domain. I think WBUR did an article on the issue.
[0]: https://en.wikipedia.org/wiki/David_Grinspoon
EDIT: Peter has his own Wikipedia page too: https://en.wikipedia.org/wiki/Peter_Grinspoon