Because it has been mathematically proven that to improve personal gain (in cost of everyone else in the pool), you should hop into another pool when pool's CDF is around 43.5%
This is why theres this score system (also pplns, dgm, etc...)
you can read more from:
http://bitcoin.atspace.com/poolcheating.pdfIt means that with optimal strategy it is possible to
gain on average 28% of ones hashrate by switching from the pool after 43.5%
of the current difficulty number of shares have been contributed.
Thank you for the PDF, but this is for me mathematically too high
For example:
The round duration is 1:00:00 and the CDF is 50%, i have 500 share soon. When i disconnect from the pool, and the pool work continue, then my shares value would every time less.
with 30% CDF (10k total shares) i earn (with simple method) 0,00125BTC. But we dont have now a block. The pool work continue for half hour. Then the CDF is 45% and the total shares is 15k, then my shares value is now only 0.000833. While the duration would more and more, my shares would every time less.
Sorry for my bad English, its possible that i write wrong many thing, i write here with numbers:
#1
Block Duration: 1:00:00
CDF: 30%
Total Shares: 10'000'000
My shares: 500
My estimated reward: 0.00125BTC
#2
I disconnect at this time with 500 shares.
#3
Block Duration: 1:30:00
CDF: 45%
Total Shares: 15'000'000
My shares: 500
My estimated reward: 0.000833BTC
#4
Block Duration: 2:00:00
CDF: 55%
Total Shares: 20'000'000
My shares: 500
My estimated reward: 0.000625BTC
#5
Block found! 25BTC
Block Duration was: 2:30:00
Total Shares was: 25'000'000
My Shares was: 500
My reward is: 0.0005BTC
Why is that method bad? I become the reward what i worked for the block^^
And what its whit these block?
18284 2013-05-30 09:23:24 5:14:27 48529423 764 0.00000027 none 238658 25.41754350 confirmed
I has
764
-----------------
48529423
split worked for the block, and im quasi not rewarded though that i have the whole block duration worked?