Models

 transactions ( facilitating entities, causing entities) 

marketplaces ( causing entities, buyer-seller gravitational force)

return percentage of each interaction/entity

 (transaction-causing entities have super high return percentage as a business, because by definition that transaction was not taking place earlier and now it is possible...so more and more people keep joining the bandwagon and keep transacting.... therefore increasing the gravitation force .........which keeps increasing number of transactions ....forms a positive feedback cycle.......for each transaction there will be some small return percentage attributed to the bottom line of the business.... therefore investors of that business should see upwards of 50% of return.....  )

I need to refine it even further

... .this is why I prioritise learning over everything else