I understand that a mining pool operator distribute work units at it miners.
Is it possible that a miner can find no share in his work unit?
If is the case, this mean a miner can work for nothing?
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A good pool should manage difficulty levels so that every qualified 1 worker finds at least some share. It may be a very small share, but something should be counted.
1 By qualified, I mean a processor in the same league as the rest of the pool. If you join an Intel CPU miner to a pool of ASIC miners, your miner would not be qualified, and it would be appropriate to not get any shares.
