A sign-up isn't a lifelong commitment
When someone joins your audience, they've taken a small but important step.
They've decided your business might be worth hearing from again.
That doesn't mean they've agreed to become your most enthusiastic supporter.
They might want practical information. A useful resource. Product updates. A place to ask questions. Perhaps they're still deciding whether what you offer is right for them.
The first job is understanding what they expected when they signed up.
If you promised helpful advice and immediately start sending unrelated sales messages, there's a fairly obvious mismatch.
If you invited them into a community but haven't explained what happens there, they're left standing awkwardly by the metaphorical coat rack.
A good audience retention strategy begins by delivering on the invitation.
Tell people what they've joined, what they'll receive and why returning is worth their time.
You invited them in. At least show them where the drinks are.