很好奇，那些大数据公司的"大数据"是怎么来的呢？

买的

显而易见

众所周知

无可奉告

大数据有个分支就是数据挖掘

这很难说，有的公司本身就产生大量数据， google ， ms ，沃尔玛这类。

有的公司可以从别处拿到，医疗类的可以找医院啊，治疗机构什么的，还可以找电力公司啥，如果你做的是能源相关的

最后一类就是无可奉告了，比如最近特别火的， Palantir 据说就是他们帮助美国找到本拉登的。这家公司很神秘，没什么资料，资费巨贵无比。

是个 app 都有隐私收集的功能吧

诈骗轰轰烈烈，楼主还没想明白？

#广告 .br />address=/114lm.com/127.0.0.1
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address=/linktech.cn/127.0.0.1
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address=/onetad.com/127.0.0.1
address=/qiyou.com/127.0.0.1
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address=/shendu.cc/127.0.0.1
address=/sonicmedia.cn/127.0.0.1
address=/ta80.com/127.0.0.1
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address=/union001.com/127.0.0.1
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address=/unionsky.cn/127.0.0.1
address=/uogo.net/127.0.0.1
address=/xcy8.com/127.0.0.1
address=/zwads.com/127.0.0.1
#文章共享 .
address=/bshare.cn/127.0.0.1
address=/chinauma.com/127.0.0.1
address=/chinauma.net/127.0.0.1
address=/denglu.cc/127.0.0.1
address=/duoshuo.com/127.0.0.1
address=/jiathis.com/127.0.0.1
address=/tanx.com/127.0.0.1
address=/ujian.cc/127.0.0.1
address=/uyan.cc/127.0.0.1
address=/wumii.cn/127.0.0.1
address=/wumii.com/127.0.0.1
address=/yigao.com/127.0.0.1
address=/yunshipei.com/127.0.0.1
#文章共享(国外) .
address=/addthis.com/127.0.0.1
address=/gtags.net/127.0.0.1
address=/live800.com/127.0.0.1
address=/vimeocdn.com/127.0.0.1
address=/zemanta.com/127.0.0.1
#流量统计(国外) .
address=/histats.com/127.0.0.1
address=/userlook.com/127.0.0.1
address=/hitslink.com/127.0.0.1
address=/hitsprocessor.com/127.0.0.1
address=/webterren.com/127.0.0.1
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address=/staticsdo.com/127.0.0.1
address=/51.la/127.0.0.1
address=/admaster.com.cn/127.0.0.1
address=/ajiang.net/127.0.0.1
address=/baifendian.com/127.0.0.1
address=/cdnmaster.com/127.0.0.1
address=/cnzz.com/127.0.0.1
address=/cnzz.net/127.0.0.1
address=/gridsumdissector.com/127.0.0.1
address=/icast.cn/127.0.0.1
address=/ipinyou.com/127.0.0.1
address=/linezing.com/127.0.0.1
address=/mediav.com/127.0.0.1
address=/miaozhen.com/127.0.0.1
address=/vipcnzz.com/127.0.0.1
address=/wrating.com/127.0.0.1
address=/ybzhao.com/127.0.0.1
address=/zxhqs.com/127.0.0.1
address=/www.dratio.com/127.0.0.1
address=/www.trackmaster.com.cn/127.0.0.1
address=/www.webdissector.com/127.0.0.1
address=/www.weibomaster.com/127.0.0.1

……