It is an MLM - a type of ponzi scheme disguised to look legitimate but is a scam. The method by which this scheme runs is that new investors putting in money - that money goes to pay older investors. The ponzi will survive as long as the new investors coming in are paying but not everyone will - so it is bound to fail one fine day.
- Who is the legitimate owner
Probably they are a group of people whose sole reason of living is scamming other people. It is difficult to get this data without help from cybercrime department because the actual scammers would have likely removed all traces of their identities on the internet.
- Info about hashpower
If you want to learn about hashpower and it works I suggest you read the wiki on bitcoin mining. In this case though there is no mining happening in real.
- Where they find liquidity (exchange they use)
Tough to get these data.
I would be very happy to know more about this, thx guys.
The only thing you need to know is that they are a scam and the link you provided has given hints towards that. There are numerous scams in this sector happening like this and it is nothing new to older members of this forum. Maybe new to you, so you should know this from now on and be careful in future.