Yes this is legit, I discovered it myself, and tested it overnight getting legit tons of DP, all you need is any program that let's you create and bind macros, personally I am using razer synapse. Full tutorial in description and proof in the video (The only key I pressed in the entire video is M2 which is what the macro is binded to).

https://www.youtube.com/watch?v=6FYpITKp5PI