Yes, yes it is. Even crazier, since it is a membership organization, and has no power to actually force its members to adhere to those standards. It’s not like GARM could do anything if Coca-Cola decided to place ads next to Nazi tripe other than say: “we’re sorry, but you can no longer be a member and we won’t take your dues anymore.”
Xitter is banking on Muskrat’s fart-sniffing fandom to not understand that the membership of GARM join in order to influence the creation of those standards, make those standards public and transparent, and then evaluate platforms for adherence to those standards and provide a grade to their membership to assist them in making ad buy decisions. The courts will have no such trouble. (Yes, I worked for an industry association at one time.)
My guess is Muskrat hopes this SLAPP suit will intimidate GARM into not pointing out how horrible Xitter is, or maybe spur his fanbois into boycotting GARM members?
They also love blaming others for their disastrously bad decisions. Their failures are never their fault, but the fault of some external group that lacks the understanding of how awesomesauce they are and vision to let them do whatever horrible shit they want to do.