This is some fantastic detective work, @nikflossus. Rubbish like this is why reputation scores are so important.
The idea that they're paying out to dolphins/whales to keep their rep up is genius. In time, the trustworthy players will be the only ones left standing.
There'll always be new bottom feeders trying it on, but posts like this alert the community to the issues.
Give it a year, and stuff like this will be up there with emails from Nigerian Princes.