$300 / Year for this option
This optional feature will allow fans, parent, students and athletes to subscribe to receive updates from your site. They can choose to receive them via email or SMS (text messaging on their cell phone).
You could use this to send out score updates, final scores, weather cancellations, announcements, news stories and the list goes on.
Fan get to choose which sports they want to receive updates for so they don't get updates for sports they don't follow.