The assumption is that each person's birthday is chosen randomly from the $365$ days of the year.

Birthday paradox: meaning of random
China's Guangzhou Evergrande FC set up a mouthwatering FIFA Club World Cup semi-final against European champions Bayern Munich after seeing off Egypt's Al Ahly 2-0. And Guangzhou Evergrande FC challenges Bayern Munich on their newly released posters with this slogan: Where Amazing Happens. 



I am wondering if this slogan is a right expression. Amazing is an adjective without doubt, then how could it be used alone as a subject? I have thought this over and now I guess maybe it is acceptable using some simplified, less-grammatical expressions for news titles and slogans, isn't it? 
