Wasn’t there a moderately popular audio-only social media startup a couple years ago?

You're thinking of Clubhouse? Raised around $200M. Fast up and down. The behavior our old startup had noticed 10 years earlier was that while people were happy to engage with audio only, retention was tough unless there was something more. For us that meant focusing on the health-related talks. Patients and their doctors and support group leaders took the talks as part of the recovery process. Very different retention came from that.