App.net：收费但无广告的社交网络

　　今天是无广告社交网络App.net上线一周年的纪念日，App.net目标是建立更加包容的社交网络平台。App.net是由Dalton Caldwell创建的。Dalton Caldwell创建App.net是因为对于现有的社交网站，尤其Twitter，过分追求广告盈利而限制开发者权限的做法感到失望。

　　因此App.net采用了另一个不同的模式：收费但是无广告。能够百分百的关注开发，并把提高使用体验设为目标。目前，开通App.net 的会员需每月付费5 美元，一年36美元，可以享有10GB的文件存储服务。最近还新推出了免费版，但是需要收费版用户邀请，而且服务内容受限。

　　经过了12个月的发展，App.net还无法挑战Twitter和Facebook的用户基数，Caldwell称现在的用户人数他自己的粉丝有15000人。但是App.net不限制开发者权限的愿景还是很吸引人的。

　　微博类的公司都会有超于微博本身之外的追求。比如Twitter公司就错过了通信软件Direct Messages的发展，结果市场被WhatsApp占据了。http://www.zhihu.com/collection/21592856

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