I don't really care about the exact details. I know that they are cashing out huge amount of money every week and that's all i need to know. They also try to cover their shadowy proceedings by removing transaction history on the site but anyone can go have a closer look if they want to.

It is clear from https://steemit.com/@steemit/transfers that they have sent money to @steem. This account should be showing the received transaction like every other account but it is not, the history is blank.