但Facebook在F8会议上最大胆的举措并不是上述功能更新，而是在社交层面进一步与Netflix和Spotify等其他服务进行整合。现在，如果用户希望注册Spotify，就必须提供他们的Facebook账户信息。而这一点对用户来说，有利的一面是可以在Spotify或Facebook上直接找到和收听朋友的播放列表，而不利的一面则是自己的音乐偏好将被公之于众（例如，肖恩•帕克正在收听Florence + the Machine乐队的音乐）。而随着时间的推移，这类新的数据可能蕴藏着巨大的商业价值。虽然现在许多网络出版商允许用户选择是否在Facebook上公开自己的动态，比如他们读过的文章，或他们购买的鞋子等，但多数用户都会跳过这一步。而在新的模式下，共享成为了一种选择性退出，而不是选择性进入。由此，Facebook可以突然之间获得大量的用户在线行为信息，并最终利用这些数据来出售更有针对性的线上和线下广告。 如果说谷歌AdWords和AdSense广告平台是目前帮助广告客户找到大量有采购目标的受众，那么社交广告的用途则是用来帮助人们发现新的事物。
But the boldest move at F8 was not Zuckerberg's flashy redesign but rather deeper social integration with other services like Netflix (NFLX) and Spotify. To register for Spotify, newcomers must now use their Facebook credentials. The upside is that you can find and listen to your friends' playlists on Spotify or on Facebook directly. The downside is your musical tastes are revealed to the world (i.e., Sean Parker is listening to Florence + the Machine). This new stream of social data could prove invaluable over time. Until now, although many web publishers offered users the option to publish their actions -- articles they read, shoes they buy -- on Facebook, most people took a pass. In the new model, sharing becomes opt-out rather than opt-in, and Facebook could become the sudden recipient of a good deal more information about what we do online. Eventually, the company could use the data to sell even more targeted ads both on and off the site. If Google's AdWords and AdSense are the de facto tools for helping advertisers reach large numbers of people who know what they're looking for, social ads will be the tool for helping people discover new things.
One day in late October, tech blogs started buzzing about the latest bit of news on the social web: Zuckerberg had lost his place as the most followed Google+ user. Who edged him out? None other than Larry Page. Trivial, perhaps, but it's hard not to think that the news lit up smiles across the Googleplex. Neither Google nor Facebook likes to talk about competing with each other (and neither company would make their CEOs available for this story), but battles are raging on multiple fronts, and both sides celebrate even the smallest victory.
Nowhere is keeping score easier than in the battle for talent, where every engineer or executive who defects from one company or the other is easily tabulated. On that front the battle has been a lopsided affair. Look through the ranks of Facebook, from upper management to lowly interns, and you'll bump into ex-Googlers like Adams, the social researcher, at every turn. Four of Facebook's 11 top executives hail from Google, including COO Sheryl Sandberg and David Fischer, the advertising and operations chief.
These numbers, however, don't tell the full story of a battle that began as far back as 2007 and has only intensified since. Facebook's weapons of choice? Its cachet as the hottest Valley company -- and its potential to mint millionaires when it finally goes public. Google has fought back with money, lots of it. In some cases Google offered top engineers or execs more than $10 million in equity and cash if they stayed, said an executive directly involved in the talent wars. Word spread quickly, and many Googlers did what rational people would do: They got an offer from Facebook just so they could get a big raise at Google. "It created an un-Googley environment," says a senior manager who left Google recently. "They like to be merit-based." So in January, Google tried a different approach: It lavished a giant 10% raise on its entire workforce. It also shifted a large chunk of employee bonuses into base pay. As a result, many people saw their paychecks increase by 15% or even 20%.
But if Google is playing defense on the talent war, it is clearly playing offense in the battle for eyeballs. Its most powerful weapon is its status as the dominant Internet company. In September, for example, when it opened up Google+ to everyone, following a 90-day trial period, it unleashed the kind of promotion that even the biggest brands would envy: A large blue arrow on its homepage pointed the tens of millions who visit it daily to a Google+ tab. Traffic on the site spiked immediately. In addition to Google.com, Google plans to promote Google+, day in and day out, to the hundreds of millions of people who use services like Gmail, Maps, and YouTube; and to weave it into millions of Android handsets. Says Dick Costolo, the chief executive of Twitter: "There is no doubt they are going to be able to pull in massive numbers of users."
Naturally, it's Google's power to pull in those users that worries Facebook the most. For years executives there have said that they are confident they can beat Google on a level playing field. But they fear that, like Microsoft in an earlier era, Google will use its power to peddle Google+, and not always fairly. Some tactics, like promotions on Google.com, are effective and uncontroversial. Others, like Google's ability to use its search engine to promote Google+ ahead of other social services, could prove more problematic. Google has not yet done so with Google+, but it has done just that with other services, like its maps, prompting rivals to cry foul. Google may think twice before engaging in such tactics, as it is already under a government antitrust investigation. Yet with mobile as the next battleground, Google may also find ways to build many Google+ features right into Android phones and tablets, making it harder for rivals to compete.