but a subspace owner can go on chain whenever they want, or do subspace delegations always stay off chain?
yes they can take their ownership on chain if they want, and it is treated as a top level space
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once they go on chain, can they go back off chain?
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i think so, yes - if they let the onchain subspace utxo expire and are included in the space owner receipt committed onchain afterwards
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can they delegate it back to the space owner without waiting for expiration?
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