The antitrust lawsuit filed last week by Compass against Northwest MLS (NWMLS) has generated a lot of talk, but it is far from the first time a brokerage has sued an MLS over an alleged antitrust injury. There is a slate of recently filed suits — as well as those filed in the 1970s and ’80s — that allege antitrust injury. But these focus on the National Association of Realtors’ (NAR) three-way...