No, don't have to pay commission on every sale. I have similar app for this website https://balloonslane.com/nj-balloons/ that is delivering quality balloons in New Jersey.

Let me check and apply your settings.

There are no restrictions for such kinds of games. I think you can publish your all games but please keep in mind that no nudity or vulgar content should be published. I already published an app for my website, that is balloonslane.com.

Spending so much money on ads I will recommend you create a website for your app and do proper optimization. You will get organic traffic through google also there another way to attract the audience is that create a youtube channel and provide them with the benefits of your app, I have applied similar strategies for my balloon delivery business. You can also search for balloonslane.com and check the audience.

Before posting anything on China App Store you must have a valid license for it before that you cannot add your app there. I have already tried this uploading my app for my business website which is for watches(https://catchmyswag.com/collections/watches) but they rejected it