>If you are making money (i.e. beating the "house") you are by definition laundering information, and profiting off of deniability. Everyone who isn't doing this is the sucker losing money on a betting market.

???

There's no allowance for skill? Even in financial markets, there's no reason to believe why people who continually beat the market must be insider trading. That's not the same as saying that people should be day trading, but that doesn't mean the reverse is true.