The Seoul Marathon is blatant collusion between government and business

Everyone knows that companies make hundreds of millions to billions of won in profit from a single marathon.
And then civil servants claim they are saving costs by allowing the use of public spaces?
This is blatant collusion between government and business. Is there no quid pro quo involved, whether it be money or the media providing favorable coverage?
How does it make any sense that in 2026, South Korea is still openly engaging in this kind of handout and profiteering?