Will my promo code work if I use bonuses? Emma June 13, 2019 12:35 Follow Yes, your promo code will apply regardless of whether your payment is covered by referral program bonuses or not. Related articles What is Crello referral system? How do I use Crello referral system? Do you offer special rates to non-profits? How do I redeem a promocode? Is there a limit to the maximum number of people I can refer? Comments 0 comments Please sign in to leave a comment.