Why are Coinbase staking rewards significantly lower than Lido and Rocketpool?

At time of writing, Coinbase offers an APY of 4.18%, while Rocketpool and Lido have 7 day average APRs of 8.21% and 9.00% respectively. Why is there such a dramatic difference?
My initial sense is just that Coinbase charges a higher fee for convenience of not having to self-custody and do everything on chain. Is there another reason for this massive divergence in yield or is that it?
submitted by /u/LuDortian007
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