When the friend you've invited to Airbnb signs up and books a trip, how much they’ll get depends on the price of their reservation excluding taxes and guest fees:
Spend $400 SGD, get $20 SGD
Spend $800 SGD, get $40 SGD
Spend $1,000 SGD, get $50 SGD
Spend $1,500 SGD or more, get $75 SGD
Plus, they’ll get $15 SGD off when they book their first experience of $50 SGD or more.