We are not paying for Reddit's API to get our data, there are some really good and complete and publically available dumps of Reddit data available online. We are in contact with the folks at Reddit, which is of course a YC company, so they're aware of what we're doing.
Thanks for the feedback here! We recently started looking into mobile apps through the lens of react-native-web but that's still not a priority on our roadmap yet.
Was there another specific format you had in mind?