Bungie has decided to take a firm stance against cheating in Destiny 2, especially on PC, preventing other applications from inserting code into the game client. While on the surface this may sound like a good thing, it will prevent a large number of popular applications from functioning.
This will prevent programs like Discord from delivering notifications, Hardware monitoring tools like MSI Afterburner and FRAPs from functioning and stop steaming programs like OBS and XSplit from capturing game footage.
To help ensure that every player will have a fair shot at fun and glory in Destiny 2 on PC, we resist attempts by third-party applications to insert code into the game client. This may result in incompatibility between Destiny 2 PC and the features of common third-party applications.
To capture footage of Destiny 2 on PC you will either need to capture the video feed directly through hardware or utilise solutions like AMD ReLive and Nvidia Shadowplay.
This will make Destiny 2 more difficult to play than the average PC game, especially given the fact that Bungie has not confirmed whether or not a built-in FPS monitoring tool will be included in the game's options menu.