For when and how long your profile photo shows up on other people's newsfeeds, so they can orchestrate it, so that other people more often ending up liking your profile photo over a delayed period of time for example.

你的头像什么时候、多长时间出现在别人的信息推送中，如果他们延长推送时间，就会有更多的人给你的头像点赞。