Prohashing Mining Pool Forums

Unreasonably low luck and socialized losses
Some miners have unreasonably low luck. While all miners can have streaks of poor luck in finding blocks, some mining rigs are so unlucky that the number of blocks they submit to the pool are far fewer than what would otherwise be expected. These miners exhibit characteristics that allow Prohashing to identify them as "unreasonably low luck miners."

It isn't clear why some mining rigs exhibit low luck, although it has been suggested in some forums that the low luck results from cloud hashing services that rent out miners from owners who use buggy software. Therefore, the victim of low-luck miners often has no idea that the hashrate he is renting is providing less mining power than what he is paying for. Be careful to only rent miners from reputable cloud mining services and look twice if the price seems too good to be true.

The balances of low-luck miners earned during the previous day are forfeit and credited to the remaining miners as "socialized losses." The odds of a false-positive forfeiture are estimated to be around 1 in 10,000, which means that normal miners would expect to forfeit one day's earnings in 30 years of mining, whereas low-luck miners will often find themselves forfeiting balances on consecutive days. If the low-luck algorithm issues a forfeiture against your account, E-Mail Chris and he can assist in tuning your miners so that the problem is resolved quickly.