This plugin allows you to subscribe users to Aweber when they register or make a comment on your blog.
When a logged in user visits a blog for which they have no capabilities (i.e. not subscriber), they are automatically added as a subscriber.
Provides an all-in-one registration point for subscribers to your blog. Uses Paypal API and recurring billing.
Plugin hides chosen parts of postings from common visitors and shows them to feed-subscribers only.