What is PLEX?
A Pilot License Extension (PLEX) is an item that adds 30 days of game time to your EVE Online account. It can be converted from any game time code and, like any other item, it can be traded on the EVE market. Please keep in mind that PLEX cannot be moved between stations.

Why use PLEX?
PLEX offers an alternative way for people to pay for their subscription without the use of our more conventional payment methods. Using PLEX, pilots can earn game time simply by playing EVE.
The PLEX system improves on the current method of secure time code trading since it uses the EVE market to nerf price fixing. And since you can only sell time codes to people who want to play for that time, the system is capped.
PLEX is for everyone.
PLEX can be used by players regardless of the type of account they have. When you activate a PLEX, the extra time is added to your account immediately. In this respect, PLEX works exactly like a prepaid gamecard.
- If you are currently using a Trial account, your account is converted to a paying account and the 30 days are added onto the remaining days left in your trial period.
- If you have a recurring subscription, the 30 days are added onto your account and billing resumes as normal after that time.
- If you use game time codes to pay for EVE, PLEX adds days to your game time in exactly the same way.
Further information:
How to create a PLEX
How to buy and sell PLEX
EVElopedia article on 30 day Concord Pilot Licence Extension