This is such bull. How could any postal service in good conscience (or legally for that matter) co-operate with a service which consists of opening other people

This is such bull. How could any postal service in good conscience (or legally for that matter) co-operate with a service which consists of opening other people's mail? Any postal service should deliver mail to the addressee, unopened and unchanged. Any deals that put that mail in the hands of third parties should be a no-go to start with. And they also shouldn't be offering this themselves. Closed envelopes stay closed. If that means postal services are not profitable, so be it. That was never the reason they existed in the first place.