the site
https://techmachines-miners.net is a SCAM ran by someone called Vidal. Registered with Namecheap, it is apparently running from France, with a French phone number disconnected...
Vidal will get you hooked with a small machine plan for 2 days and you will withdraw your small $80 profit with no issue.
Then you will buy a larger machine plan. He will do "all he can" to help you if you don't have the full amount.
Once your big machine is running, he will tell you the next day that you have won a block reward worth $22,000 and you will see that BTC amount in your mining profits.
Problem is that you will not be able to withdraw it.
Vidal will ask you to create a wallet with blockchain dot com and will ask you for the account QR Code connection so he can "pair" it with the "machine" for immediate withdrawals... He will tell you to change your password as soon as he has done it. This was the only statement that sounded OK as the blockchain mobile app is warning you not to share that code with any one... but Vidal is quite good and will tell you to ignore the warning (duh, of course he will say that...)
Vidal will let you take a couple $100 withdrawal that will work and then he will ask you to try withdrawing all your mining profits. That will be declined...
Vidal will tell you you have to load your blockchain wallet with $6,000 so the "machine" can sent the funds to it!
Even if you can't pay $6K into your wallet, Vidal will "accomodate" you with a lower amount and tell you that he will try to work around...
As soon as you transfer your second set of BTC to this blockchain wallet, it does work immediately, but not in the right direction!
All your funds, inlcuding the initial two withdrawals are immediately sucked into his own account and your balance is now $0.00...
This is a perfect scammer plan and Vidal deserves to be in jail.
DO NOT FALL FOR IT.
Keep your money and buy coins instead. Your funds will be lost as I lost mine.