There's something you don't know. 产品代言 can make a lot of money. If you have been to China (just go to a small town can liao), you can see their pictures on their local brands' posters placed inside/outside retail stores.
Below is their price tag in China for commercial companies if they want the duo to do advertising for them.
https://www.hsstar.com/newsview_1008.html
You can read more about advertising and entertainment so that you can know more how they work. The money is very lucrative because China has tons of businesses and products waiting to engage these celebrities to advertise their products.