The nice thing about companies like numer.ai, is they give you a clean nicely formatted dataset to work with. With data that isn't public and that cost lots of money to obtain. There are a lot of people who are good at machine learning, but wouldn't be able to participate in the market without a service like this.

It might be an interesting idea to sample the market using this (e.g. to obtain behavioral economics signals), even though I don't believe this is their original intention.

haha I had the same thought when I saw the title, 'wait, that's just regular commerce right?'

The market is like a giant voting machine but not really a fund, since nobody is managing it.