What was the referral code?

Excuse me, could you please clarify what you mean by "referral code"? Are you referring to a specific promotional code or discount code that can be used to refer new users to a cryptocurrency platform or service? If so, it would be helpful if you could provide more context or specify which platform or service you're inquiring about. Additionally, referral codes can vary depending on the company or platform, so it's important to ensure that we're on the same page. Thank you for your question.