Every plan brings the same parts: the premium add-ons, the premium templates and support; the plugin itself, every update, every core feature and the other add-ons are free on any site. A licence key works on one site at a time, and each plan has as many keys as it has sites. Subdomains and the sites of a multisite network each count as a site of their own.
Pricing shows each plan’s yearly price in your currency.