It's been half a year since the birth of the new wallet. I personally got some experience.
Internal circulation mining is to pay a certain proportion of handling fees through wallet-to-wallet transactions after the block incentives are exhausted, rewarding the miners who pack the transactions.
In theory, in the case of active transactions, handling fees are a rich incentive.

Internal circulation mining may become the mainstream in the future. This attempt of IFC may really find a bright way for BTC.
Internal circulation mining can actively reject the mine tyrant.
Experience tells me that the right to extraction is not entirely controlled by high-powered miners.
Under the mode，it has a certain randomness, because such randomness will make the cost of long-term mining machine which belongs mine tyrant increased.
There are two factors that influence randomness, intensive trading and lucky trading fees.
So,I think in the future, super pool may no longer be dominant in the internal circulation mining mode.And I think super pool are also very centralized.