I don't understand. If I want to sign up with my family or friend to something, I would trust/know them enough to just talk about them. What this service does I

I don't understand. If I want to sign up with my family or friend to something, I would trust/know them enough to just talk about them. What this service does I have no idea. > Do you ever need that last person for your T-Mobile Friends and Family Plan? Does it imply strangers getting on the plans? The "escrow" part of the landing page would make sense, but who would do that? I wouldn't. > Need a new friends and family plan? I don't understand this, who looks for plans? It seems like people would rather look for services, and /then/ look for plans if the service seems good enough - not the other way around.