I can only give this comment one upvote, I wish I could give it more. When you've got no outside funding and you're keeping your idea alive though sheer will power then eventually it grinds you down. Most startups fail, my guess is that this guy finally came to the conclusion that there were a number of problems which he no longer had the energy or cash to solve, I'm sure he gained a lot of insight from the process even if he can't quite bring that to bear just yet.

I wish him luck and wholeheartedly thank him for making that post.