Subscribe2 uncomfirmed users – do they get emails?

I am trying to modify the Subscribe2 code so that all users, whether public or registered, get the full plain-text post rather than an excerpt. Since this is on a live site already, I don’t have any way to test the code. So I have two questions:

1) If I temporarily unconfirm all users via the database, can I send a test email by creating a new post and be sure that the subscribers on the list won’t get the test message? Do unconfirmed subscribers get emails?

2) Where is the subscription type stored for registered users?

I modified the code in class-s2-core.php to try to make the plaintext full content emails go to the full list, and instead it emailed everybody twice – one excerpt and one fullbody. Ooops! I am wondering if it would be better to just send the full body to the excerpt recipients?

I’m confused about whether or not there is any overlap between the list of public subscribers and the list of registered subscribers… are they mutually exclusive lists?

Thanks for any help you can offer.