Supposed mining pool that transforms usdt into eth.
Impossible then to withdraw the "benefits" because they always ask for money to cover fees and taxes.
It was through a website only reachable via Coinbase Wallet browser.
It has been deleted and then recreated with different urls.
I do not know the current one.
http://usdt-xyz.com/
http://eth-gto.com/
http://eth-mco.com/
