A fact is BFC mining machine (also known as Baofeng in China) started to ship on Jan.2018. They sold about 30,000 mining machine, each has 4T hard-drive.

BFC is a distributed system provide CDN and blockchain full node services(They helped a lot of blockchain team such as Qtum to extend full node numbers). Bitcoin full node is also one of their service - a free service to bitcoin community.

There should be some bitcoin nodes on their distributed network .