such as Qualcomm mediateck or exynos

why does Qualcomm has more acceptance than the others?

http://media01.versus.io/samsung-exynos-5422/front/front-1393422429316.flat.jpg

http://techent.tv/wp-content/uploads/2015/01/mtk-chiprender2.png

http://static.specphone.com/web/wp-content/uploads/2015/01/Snapdragon-Chip-with-logo.jpeg