Stars are the same, and stars may not have used them. The same star may be the product they endorse. I just use it in front of the camera for work, and I still live in private. Earning money is so hard, who will be so extravagant? Besides, as long as the stars speak for themselves, they are donated by the manufacturers when they are used, and there is no need to spend money. In fact, it is not necessarily how easy the product itself is. Stars are good at acting, and publicity is an exaggerated performance. This is their job.
Shouting loudly can only prove how dedicated and hard they are. Can't prove the quality of the product. If they use it for a while, the endorsement will be convincing, but even if they use it well, it doesn't mean that others have the same effect. Moreover, whenever there is a celebrity endorsement, the price of the product will also increase.
Buying a star with the same paragraph is not a rational consumption behavior. Buying a star with the same paragraph does not necessarily have the effect of a star. For example, clothes or accessories look good on you, so you can wear them. You can't blindly follow the trend and spend a lot of money. As a result, the effect is not good, and it is oneself who is injured.