Well done piece on a subject that gets too little play.
The payoffs in the exotics change dramatically on the last flash based on whatever arb those guys are running on the race. No, they don\'t always get it right, but often enough.
I posted many months ago that some crew was betting 15k or more into the NY exacta pool early in the betting, nearly every race. Many times on insane combinations, skewing the odds badly. This went on for some time, with what looks like mediocre results (from what I could tell).
Gone now. Or changed the m.o.