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Imagine the pool operator goes offline due to technical reasons, what are the risks for investors staking at that pool?
None, if the pool goes offline then you just can't stake to it.
If you have delegated your funds to the staking pool, you have nothing to worry about, even if this pool went offline. Staking is 100% safe. A delegation to a staking pool is a separate action as opposed to transferring your funds.
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