We have a number of workspaces set up in our Marketo system. Each workspace is used for one particular brand of travel that we provide. A person could possibly be signed up to receive emails from all brands, if they wanted to. Right now it appears that if a person is signed up to receive emails from multiple brands and unsubscribes from one brand's communications, they become unsubscribed from all other brands' communications that they are receiving. Does anyone know if there is a way to prevent them from being unsubbed from all brands' communications?