Use your imagination a little; I'm sure you can come up with several variants that are an even viler and more exploitative/manipulative idea than the product as it stands.

Let your kid call a crude simulacrum of dead relatives, let religious folks call a crude simulacrum of $DEITY, make an "adult" version that crudely simulates a phone-sex hotline (charge extra to recharge the minutes on that one obviously), etc, etc.