embarq previously worked with nebuad, a behavioral targeting advertising company to track customers' internet browsing habits. the goal was to deliver relevant ads based on browsing history. this has raised several legal and privacy concerns, along with the other internet providers using nebuad and related services such as charter communications and wow!. embarq's use of nebuad prompted a letter from congressman edward markey. embarq responded to congressman markey's letter. embarq later claimed that its participation with nebuad was a trial, and that they were not currently using nebuad for behavioral targeted advertising.