All I can say is that currently he has been true to his word and returned stakes +1% after 144 confirmations. I have no idea whether his idea is sound or not and whether he can sustain it in the long term. Thats all I really have to say at the moment, my knowledge of poker is limited to the very few number of games I have played with friends with a few beers, I have no idea how the big boys play!
I also doubt I can sustain it that's why I reserve the right to lower the interest or increase to confirmation when the average fund level increases so much. It is a balance of making it attractive and making it sustainable long term.