The Battle.net integration gives "better continuity" for users, and a "stronger way to participate" in the Blizz community. It has 14 languages.
"For World of Warcraft we have been able to work well around the piracy issue and we think we’ll be able to do the same with StarCraft II,” said VP and executive managing director for Blizzard’s international operations, Michael Ryder.
"The Battle.net solution provides several things. It provides better continuity for the players and it gives them a stronger way to participate in an overall Blizzard community." They dropped the Real ID feature of using real names in place of an alias.
“But what also goes hand-in-hand with the Battle.net solution is that we work really hard to offer a tailored, regional business model, so it reduces the incentives to go to a pirated solution.” Battle.net is fully localised to 14 different regions.
StarCraft II: Wings of Liberty has sold gangbusters and continues to do so. It's got a damn good reason to be on fire in the charts -for why that's so.