On September 10, 2020, the Antitrust Division of the U.S. Department of Justice (DOJ) issued a supplement to its 2015 Business Review Letter (BRL) to the Institute of Electrical and Electronics Engineers (IEEE). This update comes in times of growing use of BRLs, through which the Antitrust Division aims to incentivize innovation. But what value do the recommendations and statements in BRLs, or updates to them, hold?