Detroit casino workers have been on strike for nearly a month, and now they are calling for a boycott against online betting platforms FanDuel, ESPN BET, Hollywood iCasino, and BetMGM.

On Friday, the Detroit Casino Council (DCC), which represents workers at MGM Grand Detroit, Hollywood at Greektown, and MotorCity casinos, announced it will launch a digital ad campaign on Nov. 13 to encourage users not to use the apps until the end of the strike.

The boycott does not include Caesars Sportsbook, Caesars Palace Online Casino, WynnBET, DraftKings, Sports Illustrated Sportsbook, and others.

“Online sports betting and online casino platforms like FanDuel, ESPN BET, and BetMGM are critical sources of revenue for the companies that operate Detroit’s three casinos,” Nia Winston, president of UNITE HERE Local 24, said in a written statement.