Podcastors need data about their audience. I will not promote

I have never missed filling up the Acquired podcast survey every year. If you have ever you can clearly see that they want to build a profile of who you are, and if you have been a long time listener you'll often hear Ben say it's a challenge to get information about their listeners to share with their advertisers. I am thinking of a kind of a tool that can help podcastors to understand their audience and build a community. There's Discord and Slack for engaging with the audience, I still think there's an opportunity. Spotify have introduced comments to podcasts. What do you think?