Sign up for Rockstar Games’ newsletter. Rarely, they send redeem codes for in-game items or discounts.
Amazon Prime members (Prime Gaming) have received many free Rockstar loot codes, including GTA Online cash and vehicle skins. Rockstar Redeem Code Free LINK
The "code generator" is actually an .exe file. If you run it, you could install keyloggers, ransomware, or crypto miners. Sign up for Rockstar Games’ newsletter
Intel occasionally gives away GTA V or Red Dead Redemption 2 codes as part of hardware promotions or gaming challenges. you could install keyloggers
Use Microsoft Reward points to redeem for Xbox Gift Cards, then buy Shark Cards or games. No direct link, but effectively free.
SteelSeries regularly offers free Rockstar in-game items through their “Giveaway” tab. You’ll need a free account – they provide legitimate Rockstar redeem codes.