The Cancel My Subscription link is for those Real Estate Professionals who have signed up for our paid advertising services and don't wish to use those services anymore. Since you are registered on Trulia as a Home Buyer, there is no way for you to sign up for those services and thus no option for you to cancel them either.
Are you trying to cancel your My Trulia account all-together or do you need assistance removing email alerts or . . . ?
Customer Service Representative