i think you forgot to factor in orphan blocks
what do you mean!? is it answer on my previous question!?
There are several factors at play here... that affect the results.
1) I am paying a flat rate for hash power, I need to make sure I can turn that hash power into revenue so I can pay.
2) Stale (invalid) shares occur when I receive a share after I have received a new block and thus make the share invalid.
3) Orphan blocks are blocks that I thought I mined, so I paid as valid share, but in the end I didn't get to keep.
So, if 1 out of every 2-3 blocks is an orphan then there is a 33 to 50% loss on my part unless I adjust the PPS to compensate. My goal is to offer the highest return for your mining power and to provide you with the most mining power. Obviously, if you find a better deal some place else let me know and I will try to improve things on my side.