So - I will suggest that you make whatever export options a thing. If I could auto-export all my data, I might give it a whirl.
I had a similar experience looking into anchorFM - looked neat - like what I was needing exactly (like this maybe) - checked the terms and checked out.
With today's cancel culture what it is, I can't see buying into a SaaS that will punt so easily - I don't know if export is an option - I don't know if it's a lockout kind of thing like google does - or if you have time to get your content like wordpress.com does.. but I can build this and not worry about it, other people may want to know.