while in the latter circumstance, they might generate a Fee from staking ETH and make added RPL rewards from giving RPL collateral, amounting to as many as 6.36% APR for ETH and the additional RPL rewards.
just about https://dev.to/cleopatramorris_d539d19ea/rocket-pool-the-future-of-decentralized-ethereum-stakingintroduction-1m2b