Poetic Coding

Private Feed Key adds a 32bit (or 40bit) key for each of your users, creating a unique feed url for every registered user on the site. This allows you to restrict access to your feeds, to registered users only. The plugin will also work with plugins that filter access to posts to certain user levels, only allowing the user to see that content .

Private Feed Key

Private Feed Key adds a 32bit (or 40bit) key for each of your users, creating a unique feed url for every registered user on the site.

Christopher Finke

Feed Statistics is a plugin that tracks statistics for your RSS/Atom feeds, including the number of subscribers, which feed readers they’re using, which posts they’re viewing and which links they’re clicking on.
To display your subscriber count, use the Feed Statistics widget.
The plugin also adds a “Feed Statistics” menu to your dashboard. This section has four subsections: Feed Statistics (Options), Feed Readers, Post Views, and Clickthroughs.
It will take a few days for the subscriber count to become accurate, so you may want to wait a day or two between installing/activating the plugin and publicly displaying your subscriber count.

Feed Statistics

Compiles statistics about who is reading your blog via a feed reader and what posts they're reading.

Private Feed Key vs Feed Statistics