Yeah, you’re right. The actual quote is subscriptions, not subscribers.
“We are happy to report that we had an all-time revenue record in Services during the June quarter, driven by over 1 billion paid subscriptions, and we saw continued strength in emerging markets thanks to robust sales of iPhone,” said Tim Cook, Apple’s CEO.
https://www.apple.com/newsroom/2023/08/apple-reports-third-quarter-results/
I don’t think that’s how it works, but I’m too American to be certain.