Which suggests they would breakeven with a 6% cut - probably accurate when accounting for store design and management, app reviews, storage, bandwidth, customer

Which suggests they would breakeven with a 6% cut - probably accurate when accounting for store design and management, app reviews, storage, bandwidth, customer support, payment processing fees. Maybe the solution is to keep the current $99/year development tier for completely free apps with no IAP, but also require a $500/year payment for any paid app, and move to a 10% commission. This would reduce the amount of junk apps being submitted - reducing overheads and customer support for dodgy apps - whilst still delivering a big commercial improvement for developers of paid apps.