Bitmine has a way too high a score. Refunds, communication and ethics should all be 1/BFL. They owe customers hundreds of thousands if not millions and haven't paid a single refund in months. They answer maybe 1 out of 10 emails and every reply is some copy/paste BS. They built their own mining farm in Iceland using customer money they were supposed to pay back ages ago. They are definitely scammers, no doubt about it.