I just read everything there and from my understanding is that they guarantee a ROI for only 1 BTC, not for 2.
I think it is 1btc per xbox with a minimum of 2. Some clarification and/or an english translation would be nice.
What USB hub would be good to accommodate this (RX-BOX)?
Looks like they come with a usb hub and rpi.
With raspberry pie and Hub, does not include the power