No! You can refer as many people as you want and there is no limit to how many free audiobooks you can earn.
You’ll earn a free audiobook credit each time someone starts a monthly membership using your unique referral link or code. Note: À la carte purchases made by your referrals do not qualify for a free audiobook credit.
If you believe a referral has signed up for a monthly membership and you haven't seen the free credit come through, contact our Customer Support team and we'll be happy to help.