David Walsh (et al) is a brave man, clearly he has chosen to live by the sword.... and you know what happens to people like that :)
Yes they are very vague......obviously for good reasons. What do they mean by "we need to protect the intellectual property of our client". Who is the client? I suspect that you are right it could be the altarego company of the people you mention.
So its a syndicate of investors mentioned above that use entities such as Dataprocessors Pty Ltd to place bets in horse racing in Australlia and overseas. I read this syndicate is also bankrolling WBX