Bungie’s official support page lists "MSI Afterburner / RivaTuner" as a akin to Discord or GeForce Experience. You will not be banned for frame limiting.
Tonight, the Tower hub area was crowded. Hundreds of Guardians, their armor shimmering with arcane shaders, danced and sparred. Alex’s framerate trembled. 140. 139. 138. A cold dread pooled in his stomach. He opened RivaTuner, cranking the scanline sync and forcing the framerate limiter to 142. The numbers steadied.
It read:
0.4 FPS.
Frame 2: His own Guardian, but the helmet was off. The face underneath wasn't his. It was a stretched, porcelain mannequin with Zavala's jaw and Ikora's eyes.
While Bungie has stated that simply having these programs running in the background shouldn't result in a ban, attempting to force the overlay
A common fear among Guardians is: "Will RivaTuner trigger a Ban?" Bungie’s BattlEye anti-cheat specifically allows overlays that do not inject code to alter gameplay. RTSS is a passive monitoring hook.