In comparison, Thorchain’s incentive pendulum uses a scalar to define the ratio of total system income given to each subsystem. This means it is limited to two subsystems (validator subsystem and liquidity provider subsystem). On the other hand, Sifchain uses a vector in which each element is a weight on its subsystem’s income. This means it is extensible to more than two subsystems (for example, Sifchain validator subsystem, Sifchain liquidity provider subsystem, peg zone validator subsystem, an external chain’s liquidity provider subsystem, etc.). Near-term this will be immaterial, but as IBC develops and Sifchain becomes more composable, it will be useful for allowing Sifchain to dynamically change rewards in its two subsystems in response to on-chain activity from other blockchains.