上线以来，共有1千万个账号。他们最关键的metric是：Time Watched -- 所有用户在iOS与Android上用他们的app看在线直播的时间总和。这个指标比烂大街的DAU 、MAU有用得多。
Optimizing for DAU/MAU doesn’t properly motivate our team to create a product that people love. Here’s why: if we were motivated to grow DAU, we’d be incentivized to invest in a host of conventional growth hacks, viral mechanics, and marketing to drive up downloads. This direction doesn’t necessarily lead to a better product, or lead to success for Periscopers. We hold ourselves accountable to Time Watched as an organizational measure because it reflects the kernel of our product, and our core values.