Fortunately Apple can't prevent PWAs from telling users that Apple is the reason they can't have good things. I'm disappointed however in Apple also blocking PWA's from the App Store.
Nope. It’s just a message board. Sell contextual ads for the different subreddits, don’t bother tracking people, and be done with it. Of course that would likely require a significantly smaller workforce.
And no, email does not fit all the same use cases as notifications.