The most Ys Net's likely to know about it is that somebody didn't complete their survey, which is not necessarily an indicator of death (although for some fans it would be).
I haven't done the calculations but I wouldn't be surprised if it's a statistical inevitability that at least one amongst 70,000 backers will come a cropper during the game's gestation period, and it's probably happened with other Kickstarters whether reported or otherwise. I mean someone missing out on their deck of Exploding Kittens cards isn't likely to have been front and center of their obituary.
Mind you, if Peter carks it tomorrow, I suspect his gravestone will barely have room for his name beneath the various Shenmue quotes and characters carved into its phantom river stone.