Social media is about depositing conversational currency for use and gaining “interest” from it. A conversation can and does create a currency exchange of value. Sharing pertinent information with people whom can use said information to create more value for themselves and others creates an “interest”.
Conversations propagate based on the rate of interest. Rate of interest in your conversation is reflected by the rate of change. The more your conversation “changes” from one to one to a million the higher the interest rate becomes.