Thanks to Information and Communication Technologies (ICTs), every action on the Internet nowadays is recorded by digital by-product data: online purchases, tagging friends' photos, browsing webpages, and etc. This unprecedented technological revolution has empowered us with unique abilities to understand not only people's behaviours but also online platforms. Business corporates and academic researchers alike have both embarked on actively mining such information to stay ahead of the game in the digital age. Once lost in the sea of information that is present in every corner of the Internet,...