Does world of Warcraft free trial end after playing on it for fourteen days

The World of Warcraft trial has been revamped since Cataclysm - now activating a Free Trial allows you to level your characters to level 20, but it will not expire. However, you will be very limited in what you can do:

• Level cap of 20
• Gold cap of 10 gold
• Cannot join or make guilds
• Cannot trade, sell or mail
• Cannot level skills over 100 points
• No character/transfer services
• Cannot start groups
• Cannot use RealID
• On a full server: you won't get priority to get in

Despite this, it's a solid preview of the game itself in its current state, as it includes the TBC starting zones. It is also frequently used on RP realms for disposable villains, townies and onlookers/messengers.