Brady doesn't care if they win the lawsuit. They have lawyers on retainer they have to pay whether they are working or not. Brady will push frivolous lawsuits forward just to make firearms vendors waste resources. Some of the lawsuits Brady brings forward are so ludacris the defendants don't properly prepare and Brady wins.
PETA operates in the same manner. PETA stopped the opossum drop in Brasstown, NC by winning a frivolous lawsuit. The people of Brasstown thought the lawsuit was so silly the didn't even bother with hiring an attorney. They let the town attorney handle the case and he lost it. Hopefully, Armslist will take this suit seriously and hire the best attorney they can afford.