Even if all 700 million subscribers are $0.99/month it is still an $8.3 billion per year business. That's enough to be #362 on 2021 Fortune 500.

If you really drill into all the different numbers they release over time as investment / corporate strategy analyst you can get a pretty reasonable mix on revenue streams this size.

I don't dig in on Apple as I'm a B2B focused person so speculating a bit here based on parallel experience.