First, our primary aim here is to fund ongoing service and development. That said, this is a cloud-synced app with a support team, meaning that all users - paying or not - impose an incremental cost. To help cover that cost, we do serve banner advertising. We'll aim to do it unobtrusively. Premium plans will remove those ads.
The FAQ has always indicated we would consider advertising if we can do it unobtrusively. We're proud to receive regular reviews indicating the app is their favorite app on their phone, and we'll continue to make it great for everyone. That's part of our goal to open up podcasting and make it as accessible as possible, no matter what platform you're on.