I will try to explain more about the private connection here.

The first communication checks the update and receives license information, including for example where to mine devfee. Because of security reasons, it would be very hard to eliminate this private communication.

The follow-up communications only send runtime information of bminer, like the mining speed of each card and performance status. This may enable bminer to choose better optimization strategies.

I understand your concerns about the private connection. In future, I will consider making the follow-up runtime communications transparent. Or alternatively, I can create an option to opt-out the communications.