Setting up a Subscription Sales Page
While it is possible to purchase a subscription from the above page, its not really designed to promote and sell the subscription.
You would be far better off to setup an actual dedicate page to sell subscriptions to educate and convince the users of your site that purchasing is a good idea.
To add a page to your site, you would create a new template file and upload it to your skins directory.
eg: If you are using the jrElastic skin, you could create a new page at:
Then outline all the details of each of your available subscriptions on that page.
The url to show that template file when the jrElastic skin is the active skin will be:
So use that in your menu links and promo links to get people to your subscriptions page.