Hi, Kano

Glad to hear from you. The interest of such a big fish flatters me.
100% PPS is NOT zero fee.
It is currently about a 1% fee.
(100% PPS means you keep all the transaction fees)
100% PPS means that you get paid for 100% of hashrate in your cabinet. As you can see in demo-account (login / password: test / test) calculations is simple:
YOUR DAILY HASHRATE * ALGO PRICE = DAILY PAYMENT (The sum on your wallet is the same as the sum in the cabinet)
So can you show to anyone who would mine BTC at your pool that you have that?
I 've double checked the calculations of Meni Rosenfeld (by November 17, 2011). Really cool work -- I think every miner should read it before connecting his rigs to any pool.
First of all, he wrote this paper in 2011 when on SHA256 alogo was not so many coins and as was said in introductions "In this paper we describe the various scoring systems used to calculate rewards of participants
in Bitcoin pooled mining".
Therefore, if you want to calculate the probability of the collapse of my pool or conditions sufficient for its existence, you must take into account the market indicators of all coins for SHA256. If there are scientific works on this topic, then I will gladly read it, because I searched a lot and had to use materials from related topics such as economics for myself.