There are many possible reasons for League of Legends sweeping success, but some people might place their bet on the price tag. World of Warcraft has a monthly subscription and only Minecraft Classic is available fee-free, while League of Legends is 100% free to play. League of Legends does, however, offer game cards up for sale for real money. These game cards are used to redeem Riot Points, in-game currency used to unlock characters, custom skins, and a wide selection of bonuses.
