World of Warcraft developers Blizzard have announced that the WoW tokens can now be used for other Blizzard products.
The original rollout for the World of Warcraft tokens was back in 2015, and was a plan to enable more trading between players within the game. Similar to the PLEX concept rolled out by EVE Online years back, players can spend real-world money to purchase a WoW token and sell it in the game for in-game currency. This allows players who have a lot of gold or earn a lot over the course of a month to consistently keep their account subscribed without having to pay a dime.
It also allows players just getting started to have a way of getting more gold, and the method Blizzard has used to control the supply of WoW tokens has kept the economy from being completely overrun with cash-to-currency exchanges.