Google keeps the details of its decision-making a secret, since the company is trying to prevent sites from gaming the search engine.

FORBES: Magazine Article

Every Internet conglomerate ( Tencent, Alibaba, Baidu, Sohu, Sina, Shanda) has a search engine, 3rd party payment team, gaming, e-commerce platform, literature platform, etc.

FORBES: The China Paradox, Part 2: The Trouble With Going Global

These acquisitions include Jambool (a social gaming site), Metaweb (a semantic search engine), and Angstro (a social networking startup that pulls data from Facebook, Twitter, LinkedIn, etc).

FORBES: Google To Grab Social Search Share But Stock Is Too Dear