Many "generators" ask you to download plugins that contain malware or log your keystrokes.
Even if you ignore the warnings and try one of these tools "just to see," you are putting yourself at serious risk.
Any website, video, or advertisement claiming to have a "hack," "glitch," or "generator" that instantly adds Robux to your account is lying. The reason for this is not just a matter of trust; it is a matter of technical architecture.