It sounds like that guy created what appeared to be a legitimate wallet creation service, and then emptied the accounts of anyone who used it. That definitely s

It sounds like that guy created what appeared to be a legitimate wallet creation service, and then emptied the accounts of anyone who used it. That definitely sounds fraudulent. We don’t know if the person “guessing” Ethereum keys is also the one generating them, but from the article it seems there are multiple people scanning for known keys, so at least some of them aren’t intentionally duping users.