PLEX is an in-game item that can be used to pay for your subscription without using more traditional payment methods. By using PLEX, you can pay for your game time simply by playing the game. You can buy PLEX through our Account Management site or you can buy PLEX with in-game ISK. Because PLEX is an in-game item you can also make in-game profit for yourself by buying and selling it on the market.
To use PLEX to add subscription to your account, right click on the PLEX item while it is located in your personal hangar and select "Apply 30-day Pilot's License" from the list of options.
The item will disappear from the hangar and a notification that the 30 days has been added will be displayed.
More about how to use PLEX