Gabe Newell's appearance on the Seven Day Cooldown podcast this week revealed for the first time, confirmation that DOTA 2 will be free-to-play. Other popular MOBA titles generate revenue by selling points to buy heroes, alternate skins or experience boosters to level up more quickly. Valve are looking at a completely new approach.
Apparently Gabe suggested contributions that players could add to the game that can be measured, recognised and reward them for it. Players who provide hero build guides, train and teach others or have a good teamwork ethic are possible reward-worthy actions.
Gabe even talked of this concept working across Steam titles but was keen to distinguish Steam apart from the 'social networking' label. See more at The Verge.