I know from Korn from the German site of pokerstrategy (headmember and founder) that he brought up some ideas for deals with PokerStars that were clearly -EV towards pokerstrategy and Stars didn't even take them, so in his point of view, as I remember right what I read, negotiations are not supposed to be a success in the near future though Pokerstrategy will keep trying it.
Sorry for my bad English,
ReVo