I have been able to curate my Reddit experience with my 3rd party app in a way that I never will be able to on the official app. I might even be willing to pay a small amount monthly to keep it, but the cost is their API is going to be too high. Honestly I don't think it's about money, I think this is about censorship. They want to herd everyone into their own walled garden so they can have more control over the content.