Very happy to share that the "Le Courrier du hacker" newsletter, a weekly digest of Free and Open Source Software news in French, reached 500 subscribers on both Twitter and Mastodon https://lecourrierduhacker.com/
Lots of people are not really fond of emails and prefer following the newsletter content directly through social networks.
I exported the archives from Mailchimp to a website and now share links to new archives on social networks. It generates between 500 and 1,000 visites to the archives each day.
So from my experience it's great to offer also the content of a newsletter through social networks.