The country's attorney general had sought to have the agency excluded from the MegaUpload founder's lawsuit.
The New York-based digital ad firm said in a court complaint last Thursday that executive "raiding" on iCrossing's part forced it to close its Dallas office.
Customers will complain about lousy products. Marketing experts say using Internet tools such as blogs and forums can turn those people into an asset for companies.
Critics say Jerry Yang and David Filo blew it by getting into 11th-hour negotiations directly with Steve Ballmer. But other company founders say the dynamics of the end game are more complicated than that.