I think this is a bit too cynical.

If I understand this right - not only do you avoid having to fill out the same address forms over and over for different services, you avoid the monumental task of making sure all of your information is up to date on major life events like moving, marriage, etc.

If I could avoid typing my shipping addresses in every online order form sourced from a trusted place (browser auto-fill is shit), I'd use the service in a heartbeat. Only updating one service when I move apartments? Sign me up.