Substack is a platform that allows you to send out email newsletters to an audience. That audience can be a combination of open or closed, and public or private. Subscribers either freely receive newsletters or pay to be a subscriber. The platform has an archive of previous communication on the website.
It looks perfect as a platform for faculty to curate information for either a paying or non-paying audience. Substack only takes a cut of subscriptions, so the platform is free if you do not charge a fee to subscribers.
I can see this platform being of use to many faculty in the college.