The app works by blocking ads that the community finds objectionable. We have found that a lot of users are frustrated by longer and longer ads, repetitive ads, and ads inappropriate for their interests. In particular, a lot of our users are not based in America, so an ad for buying US postage stamps isn't that relevant.
We allow users to subscribe to up to 6 podcasts without paying the subscription fee. I think this is a pretty good deal. Unfortunately, unlike a desktop ad blocker - we need a lot of human involvement to block the ads.