Valve is now selling the official, digital program for the International 2014 championships for Dota 2 — and proceeds from its sale already have boosted the tournament's prize pool by $600,000 to $2.2 million.
The 2014 Compendium, as it is called, allows fans to follow the participants and their matches and make predictions on match outcomes. It costs $10, $2.50 of which goes into The International's prize pool. As the prize pool grows, in-game Dota 2 rewards unlock for Compendium owners, with later stretch goals benefitting all Dota 2 players.
Sales of last year's Compendium helped raise The International's prize pool to $2.8 million. To order the Compendium, or see more details about The Compendium and its fundraising stretch goals, see the official site.
Tickets to The International 2014 went on sale last month and sold out within an hour. Regional qualifiers begin in eight countries on Monday, and the finals will be held July 18-21 at KeyArena in Seattle. In last year's championship, Alliance beat Natus Vincere in a five-game match to win The International and more than $1.4 million in prize money.