Just received an email this morning. Opinion is shutting down their podcast hosting service. You can still use their app to record and edit, but no longer store on their servers. So if you want your content you need to go download it.
"We’re sorry to inform you that Opinion is shutting down the hosting service for all the hosted podcasts. This means you’ll need to download all your episodes or they will be permanently deleted by November 1st, 2017."
More info at their blog: IMPORTANT NOTICE FROM OPINION
I've downloaded the few recordings I had posted there this morning. I may throw them up on Archive.org if I want to keep them.
Opinion was an interesting service and an easy to use app, shame they have to do this. I wish them continued success with their recording app.