I think this happened when Elon backed away from using Bitcoin to buy and sell goods at Tesla for the reason of harm to the environment - something along the lines of jeopardising some environmental grant from the gov't that Tesla depended on. Saylor quickly stepped in to bring together all major bitcoin miners to establish some commitment towards renewables . I read the report - and while i can't remember the specific details, I remember it had minimal established input and was multiplied to get a nominal reference. I also remember thinking it was so much bollocks.  

In Francis's recent expose - he spoke about how there was a need for control and core devs were not giving in and one of the other options was through miners. It reminded me of the bitcoin mining council