Google is an ad company. The products they make are just good enough to reach a certain number of users and only if they get good telemetry and behavioural signals out of it.

Imagine how much more expensive (and risky) it would be to focus on products that would appeal to a larger user base. In the long term, 36% is nothing compared to the investment and costs of trying to make more people switch to Android.

> they earn 56.25% (1/0.64 - 1) more from any user they can attract to Android from iOS

Look at downloads versus spend (circa 2018 graphic, as this is an older deal):

https://www.data.ai/en/insights/market-data/global-app-downl...

And check out concepts of share of wallet and size of wallet per user:

https://www.investopedia.com/terms/s/share-of-wallet.asp

I'm not debating your stat, I'm just saying it's more complicated than that, if you're looking at ad market pay for performance.