As long as your information is supplementary (and from your plans, it appears it will be) I'm sure Scirra will be quite happy for you to have your ezine up and running.
I'd be careful regarding premium content. If I were you, I'd leave it at capx's, graphics, and other external goodies, without restricting good stories/news/reading to premium payers. Those are just my thoughts, of course you should do what you want ;)