Hi, i am testing your plugin on a multisite blog (WP 3.9.1) . I have two problems that i need to resolve before using it and eventually buying a license.
1) i configured the plugin to force registration at signup. I registered a test member but the test member is not subscribed to the newsletter.
2) Members that open a blog can see and configure the newsletter plugin. I think that who opens a blog in multisite has an ‘administrator’ role so the option for disabling editor is not appliable.
Is your plugin supposes to work with a multisite installation?
test site: http://blogdolci.dynamoproductions.it