When placing an order for a gift card that will earn you GO Points, you will earn 1% of the value of your order back in points when paying by card, or 2% if paying with digital currencies.
If you are referring a friend, both you and your friend will earn 100 GO Points. Your friend earns their 100 GO Points points when they create their Gift Off account. You earn 100 GO Points when your friend has made a purchase through Gift Off.