What is 9/10 rule in social media content creator?

[Brajet]

There is a need for someone that is social media content creator to know more about some rules and new inventions. Among those rules include 9/10. What is 9/10? It means when social media creators create contents that are educated, at least 90% of this contents, and just 10% of content that are just promotional or sales.

This will make it easier for audience to keep on following such a content creator. Share what you know about this?