You can find your unique referral link or code under the "Refer a Creator" section in your account menu. Share this link with anyone you think would make a fantastic PlayHouse creator.
Remember, they must sign up using your unique code for you to earn referral income.
Keep in mind, you can't use your own referral link, and it's only valid for individuals who've never had a PlayHouse account before. A creator cannot delete their old account and open a new one using a referral link.