Hilarious, I love it. I'm a cheaparse so if I paid for an extra phone number for something like this, I think I'd "everything-looks-like-a-hammer" it.

I'd have it...

    * give me wakeup calls, 
    * call to remind me of all meetings with an exclamation in the title, 
    * call my wife whenever my phone detects i'm entering a casino, 
    * call me whenever my wife's within 3 miles of her ex's house,
    * answer when I call and it'd give me uplifting life advice platitudes like "Hey, you're doing alright. Also, you look /fabulous/ today!"
    * ... :ponder_emoji_here: ;-)

There is an app called pushover. It's just meant to receive notification. You can set the notification type to emergency and simulate a call