I'm building a follower-only link service to help people grow their audiences on Twitter.
For example, let's say you are planning to share a free guide via Gumroad. You currently have a pinned tweet on your profile that goes direct to Gumroad.
With follower-only links, you would share a different link. The link would first check whether the user is already following you on Twitter before redirecting them to the freebie.
If you're trying to build an audience on Twitter, would this be something you're interested in?