Slingshot has had this deal for a few months now. The current customer has to refer a friend and both would get $50 credit towards their bill. Pretty sweet deal, if you haven't got a friend who is on Slingshot, let me know as I myself am a Slingshot customer - good experience with Slingshot and haven't had any issues with them.
Refer a friend, get $50 Slingshot credit each. Nice.
- Log into "My Account" from slingshot.co.nz
- Click “Extra Stuff” then “Refer a Friend”
- For every friend you refer who joins Slingshot before 30/06/15, you’ll each get $50 credit on your account.
There is no limit to the amount of friends you can refer, or the number of $50 credits you can earn!