Earlier quoted context omitted.
They’re not milking anything. Apple has, as far as I know, always charged 30%. What has changed is the way we buy and pay for apps and services. Everyone wants to move to the subscription service model and Apple has developed rules accordingly.
I thought the problem was, that their own apps do not have to pay 30%, so they can easily replace any app with their own, if they choose to.
We don't see the internal accounting but it's quite likely they do. Internal revenue distribution is standard practice in almost all enterprises.