Thanks for the questions :-).
1. Seems like there's a bit of confusion on the web-functionality. There will be no "main directory" for your magazine, so people won't be able to browse all the content of your magazine, that they'd otherwise have to pay for through the app.
In the app, you can share an article on Facebook or Twitter. More specifically, you'll be sharing a link to an online version of the article. So people can read THAT specific article, but there is no easy way for them to read the other articles in that issue.
2. All newsstand magazines must have a subscription. This can be a free subscription though, that does not necessarily provide access to any content. You can sell single issues as well, if that would be interesting.
3. That is the plan, yes. Let me know if that's a deal-breaker and how you would like to have it instead.
4. We need to transfer the revenues to a bank and we are using Stripe for that. As far as I know, Stripe requires you to have a US bank.
Do you have an online magazine already?