Ad agencies may consult with corporations as to whether a given venue is worth their investment. However, it is ultimately up to the company whether they follow

Ad agencies may consult with corporations as to whether a given venue is worth their investment. However, it is ultimately up to the company whether they follow that advice. They don’t “control” the advertising spend for that corporation. According to the logic of this ruling, however, a corporation could be sued for deciding to stop spending ad money with a given agency.