Is Roblox promo code free?

I'm curious, are there actually free Roblox promo codes available out there? It seems like there's a lot of chatter online about them, but I'm not sure if they're legitimate or just a myth. As someone who's interested in maximizing my experience on the platform, I'd love to know if it's possible to get my hands on some freebies. But at the same time, I also want to be cautious and avoid any scams or shady deals. So, what's the truth? Are Roblox promo codes free, or is it all just a bunch of hot air?