Yeah, but that score is based on in match betting, rather than "to qualify", no? So what I find most interesting there is that the odds continued to rise for PSG after the goal, even though people (like me) put money on when they went behind -better odds, and cheers for the £20. The crucial thing that's at issue with this system is that it's not just the weight of money that's at work here, but also the bookies adjusting the odds to ensure their book is still green, and to encourage/discourAge people putting further weight on particular outcomes.

Tl;dr - the method is really interesting, but imperfect because it's not a pure market, I think. Bet fair odds or similar would be interesting, but their API is horrendous.