It brings you back to the newsletter page. I have a bunch of projects that are still WIP and not quite ready for their own landing pages which is why Lua Digest uses a subdomain and also why immortalin.com does not redirect to a home page. I have been trying to get HTTPS working on the site but CloudFlare's requirement to transfer over DNS control is messing up a lot of site configs so it's currently non-https for now.
Insta-subscribed though, Lua's on my todo list.
(PS. I tried to reply to your previous comment but found you'd deleted it, thankfully found this comment via your account)