Ok, so for a newbie in this mining pool buisness, this is what I would love to know:
1) What is Pool luck?
2) How is it calculated?
3) What does it mean for a potential miner/invester in that pool?
Further questions, if any, will be added below.
1) mining is probabilistic in nature, if you find a block earlier than you statistically should on average you are lucky if it takes longer, you are unlucky
2) not possible to ELI5 - Cumulative Distribution Function requires advanced mathematics
3) nothing as it is random and unpredictable - though if it is continually unlucky perhaps you should avoid the pool