Hardware Monitoring Framerate and statistics overlays, such as those provided by EVGA Precision XOC, MSi Afterburner, and Fraps, are not compatible with Destiny 2. That would explain why RTSS isn't working, fortunately there's a built in FPS counter and is also not the reason why those of you were banned, since I'm using MSI Afterburner and RTSS (which doesn't show anything, not even the FPS on my second display which doesn't use the OSD feature).