From the article:

> If you already have these apps installed on your device, they will remain on your device. But they can’t be redownloaded if deleted or restored if you move to a new device. In-app purchases and new subscriptions are no longer possible.

But regardless, good riddance.

No. As stated in the article. But you can’t start or renew subscriptions

If you read the article, no.

No, Apple has no way to remove installed apps from a phone, but does it disable any payments and app updates