Google wants to avoid paying any fees to Apple for those who subscribe to YouTube TV using App Store, so it will no longer allow users to pay for their subscriptions via Apple in-app purchases. Of course, we don't know for sure why YouTube TV
will discontinue App Store subscriptions come March, but it's an assumption that makes sense.
reports YouTube TV has already started to inform customers about the changes. You can read below the email that many YouTube TV subscribers received in the last couple of days, maybe more:
You're currently subscribed to YouTube TV through Apple in-app purchases, so we're writing to let you know that, starting March 13, 2020, YouTube TV will no longer accept payment through Apple in-app purchases. YouTube TV members will still be able to watch YouTube TV content on Apple devices. You'll be billed for one final month of service and then your in-app purchase subscription will be canceled automatically on your billing date after March 13, 2020.
It looks like the 30 percent cut per subscription that Apple took for every YouTube TV subscriber
was too much for Google. It's unclear how is this going to affect the growth of the service now that all iOS users must sign up for a subscription via YouTube TV's website, but it surely won't help.