I think no. You cannot replace content with single edition: you need to buy
and create a new app each time. And Apple does not allow
single-article-apps in the App Store.
You are much better with a professional edition kiosk with push
notifications. But again, the content here as to be thrilling as well to
get through apple's approval.
technically you can (but this process you refered to is on updating a folio
in a multi folio viewer, not for single edition). any update with single
edition has to go through apple. single edition licence agreement somehow
states that you are not allowed to replace content. and apple thinks is not
a good idea as well (to replace the content a user already downloaded).
so we can send a newsletter by the basic "share" option ?
there's no limit in the number of people allowed to watch it ??
because it's too expensive for us to put the singlke edition cost + the downloads, if 10 000 people get it this will cost us 395+10.000*0.30: USD 3395 ... pretty expensive for a newsletter ;-) as we're a 15/20 people company