I found that in the internet research, there are companies that are engaged in bitcoin mining with Antminer S9 and that others have partnered with their own investments to create a network marketing system. In particular, there are groups on Facebook, and they first put some amount of money to the owners of the company and then they claim that they send BTC automatically from the antminer device on a daily basis. My question is, can there be such a system? Are these people reliable? Waiting for your comments.