I don't know either. It isn't like you can share the 522 extra tuner with your neighbors. Unless they live in a trailer park right next door 50 feet away. The phone requirement is there so you won't stack your accounts, but I don't see that being a problem with a single unit with two tuners built in that can go to two different tvs.
Another stupid marketing decision like dvr fees. Maybe the shakeup of executives at Dish will correct some of these stupid accounting decisions.