> compete with some service they offer themselves

if you move from ban to, systematically hinder updates, despotic interpretation of store TOS/Guidelines/Rules, APIs their apps can use and others can't which affect competitiveness of the apps, not having to pay their own fees, randomly removing top apps from the app store front/ranking/promotion, TOS which make competing impossible etc.

then they have been doing exactly that for years

i.e. "not ban but market wise not that different"