Going the other way? The fee started at 30% and has only gone down from there (ex. 15% for subs active > 1 yr). I believe the fees will fragment further and give developers the option of paying less but receiving less too. For example: You can pay 5% less but you will only show up in app store search results. Or something to this effect. We will never get blanket 30% take rates again. It was a simplification when the market was early