Push notifications without email
Allow users to have push notifications without email notifications. I don't need the emails at all, but the push notifications are super useful. I don't want all of the spam, so I turned off email (in-app only) and it stopped push notifications as well. That's not logical. Make it a set of checkboxes: in-app, email, push. So much better.
This can already be done. When you set up your app, you are asked to turn off email notifications.
You can also turn it off from the More > Notifications.