Joe Rogan has financial interests in Onnit. He's a part owner is similar. He's mentioned it on his podcast.
Listen to the Joe Rogan podcast with Dr. Rhonda Patrick. He talks about Dave Asprey and bulletproof coffee. The long of the short of it, Joe said that the myotoxin argument is bullshit. Dave's coffee was tested and actually came back with low levels of myotixins. Joe also had several coffee's tested and none of them had myotoxins. It's a mute point. Tanins in the coffee are responsible for bitterness, not myotoxins. In addition there is a process of washing the beans and the roasting process basically kills any mold etc that could cause myotoxins. They are nothing to worry about in any coffee.
Joe also said they will continue to sell Dave's coffee at Onnit because it tastes good.
For home bulletproof coffee. Use any coffee you like and any fats you want. MCT oil, coconut oil, unsalted butter.