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Many sports gambling companies do this, weighing the bets of "sharps" (people who are more accurate than the average) heavier than other bets. A good example of this was Mayweather vs McGregor where a lot of sharps were betting on Mayweather whereas the public was betting more on McGregor. Even with about 80% of people betting on McGregor, the house still had Mayweather as a favorite.

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Thats a different phenomenon than what I was discussing, but a really interesting one. Nate Silver discussed the topic with Tyler Cowen and said many platforms ban sharps, but then look to other platforms that allow them to benchmark their own odds.

I think the analogous situation to what I was proposing would be if a platform had open betting and organic odds, but sold the sharp betting data to 3rd parties.

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