Why don't the "Big Brands" of sports pay attention to badminton and pickleball compared to tennis?

Actually, I know that by creating this topic, many people will attack and have mixed opinions, because the number of people playing and discussing the two sports pickleball and badminton in Vietnam at the moment is so large and numerous. But, if you take some time and search for information about the top 3 badminton players or the top 3 pickleball rackets, you will see the indifference of the "big brands" targeting these two subjects. Tennis is so favored that the top 2-300 players in the world also receive full support from Adidas, Nike, Mizuno, Joma, etc. The other two sports are sure to earn red eyes. I often wonder and am curious, as well as like comparisons, so I will make an article based on my personal opinion and perspective to send to you. In the global sports industry, the sponsorship budget allocation of giants such as Nike, Adidas or Asics is not a coincidence but the result of extremely strict economic calculations and brand strategies.