I check their company, there is a registered company in England called EXTRABIT LTD under 10929612 for MACK Deacon.
But , I noticed this remark, I don't know what exactly it means, but it seems like they have problem that caused the director's address on the IN01 from the public register.
This is again a great research from you, but the thing is they want to mine somewhere in middle east! Can you imagine this ? Which part of the middle is now a days suitable for mining by very high temperatures? And why do they not tell us the exact place of mining ?
I got interesting info, the original company has website with this domain name extrabit.biz, as you notice it's the same Company number 10929612
and after I did some research, I found this info about extrabit.biz in this link
and by comparing those info to current info about extrabit.io , it's the same company, link to certificate of incorporation here
So, extrabit.biz was High-yield investment program and it ended up scam and now they are doing ICO with extrabit.io