Horse sellers make good use of celebrity effect and advertising effect, and take advantage of information asymmetry to sell their horses at higher prices.

People who buy horses can't distinguish the advantages and disadvantages of horses well, but blindly follow the market orientation (expert Bole's "suggestion") and buy horses at a higher cost.

As an expert, Bole became a prop for horse sellers. On the one hand, he didn't get paid, on the other hand, he misled the consumers.