Social Networks provide a social status, so they can be compared to Status as a Service tools.
We can define a Social Capital ROI: If a person posts something interesting to a platform, how quickly do they gain likes and comments and reactions and followers?
It also explains why copying proof of work is a lousy strategy for status-driven networks
Social capital accumulation skews young: I'd wager that we'd see that young people, especially those from their teens, when kids seem to be given their first cell phones, through early 20's, are those who dominate the game. Young people tend to be the tip of the spear when it comes to catapulting new Status as a Service businesses, and may always will be.
We can then define a social network on 2 axes: social capital and utility, with both ranging from low to high.
IMDb, Wikipedia, Reddit, and Quora are more prominent examples here. Users come for the status, and help to build a tool for the commons: they are low social capital, but high utilities
The best high social utility seems to be WeChat at the moment.
The author go in depth into when a status as a service business will stop to grow. The so-called social capital inflation and devaluation, because it is what is valued on those platforms. it is too much for me at the moment, but it seems relevant.