No you don’t.
You pay when you are ready to submit your app.
No you don’t.
With the Developer Plan you can hop on and hop off.
Hop on when you need to update or change your app. Hop off when you don’t.
You own everything you published on the App Stores.
Yes.
Unlimited downloads and unlimited users of the app.
The app stays in the Stores and continues to function as it.
This also works if you pause your subscription. The system will keep your App as it.
You submit your app using your own credentials.
The app is under your name under the app stores.