https://www.gamespot.com/articles/starcraft-2-dev-on-the-effects-of-going-free-to-pl/1100-6454663/

Almost every major Blizzard game had a major update for this year's Blizzcon, but Starcraft II had one of the most surprising: the main game is going to be free-to-play.

The update will start November 14, but for more insight into what the changes will mean for players, we caught up with Starcraft production director Tim Morten at the convention. In addition to learning the team's expectations for how this update will affect the player base, we also found that there'll be a little something available for players who already own all of the Starcraft II expansions.