I'm the one on the OBS team who originally found this. I saw a tweet yesterday from someone that's in the beta, and as with any desktop live streaming software (and especially with "Studio" in the name) I was curious if they were using any OBS Studio code or if it was developed all in-house. The download link is available in their JS, you can find the most recent installer link here: https://tron-sg.bytelemon.com/api/sdk/check_update?branch=ma... (note: you probably won't be able to actually use it without being in the beta group)

Without even installing it, opening the setup files showed some immediate red flags, notably the "GameDetour64.dll", "Inject64.exe" and "MediaSDKGetWinDXOffset64.exe" look awfully similar to the way the OBS Studio game capture hooks work with our "graphics-hook64.dll", "inject-helper64.exe" and "get-graphics-offsets64.exe". I don't jump straight in to disassembling everything I come across, but when it's this obvious it begs further investigation, and after some disassembly I was able to confirm that OBS code was present in their binaries.