Maybe, something has been changed, but it was said that investors from bitcointalk will get this discount. Your way of discount is interesting too. Maybe, it will be used too.
It is a step towards bitcointalk community. I doubt there are 100 investors from btctlk willing to invest something here. I would consider investing in this STo more as a charity, because to my mind cancer research and investments in R&D in this industry are depending on luck. What is probability to find a medicine beating cancer?