I own a number of furnished apartments which I lease for whoever makes a booking via a website. However, one of these websites demanded all subscribers(owners) to sign an agreement that stipulates the following: "Owners should treat all tenants respectfully and without discrimination on basis of race, color, religion, creed, sex, sexual orientation, gender identity, disability, national origin, ancestry, or age." In addition, whoever refuses to sign it gets their subscription cancelled and is denied advertising on that website any more. What is the ruling on signing this agreement?