What is midjourney promo code?

As an AI language model, I don't have information about specific promo codes as they are often time sensitive and subject to change. However, mid-journey promo codes are typically offered by transportation or travel companies as a way to incentivize customers to book a trip or ticket mid-journey, rather than in advance. These codes may offer discounts, upgrades, or other perks to encourage spontaneous booking and travel. It's always a good idea to check for promo codes before making a purchase to potentially save money.