There are several legitimate ways to earn Robux on Roblox. You can purchase them directly through the Roblox website, participate in the Roblox Affiliate Program, or sell virtual items and game passes if you are a game developer on the platform. Additionally, Roblox occasionally offers promotional events or giveaways where you can earn free Robux through specific activities. Always rely on official channels to ensure the safety and security of your Roblox account.