I just want everyone to know that 1 out of 3 blocks I find is orphaned. As a result even with a 30% fee I might not break even. At this point the pool is a public service.
I suspect that if you look at the PTS per hash that you get from other pools you will see the same thing. They only pay you for the blocks found. I am doing the same thing.
I will continue to monitor the situation carefully.
Our friends at Ypool are grabbing all the blocks because they are filled with botnets. I know you say that PTS were designed to be bot proof, but that does not appear to be the case. Ypool is down now. Otherwise I would post some examples of the hashrates certain users are getting. Some of these are confirmed bots.
The owner of pools that allow botnets are only doing it out of greed. These botnets steal the vast majority of the PTS from each block and then those of us who are mining legitimately are left with leftovers.