At first I thought the blog adds some value, as submitting the App Store directly doesn't give as much information... But actually their links all go to themselves. The Popcap homepage has a popup and banner about the sale and donation, so that would suffice for a submission I think.

I would say this is HN suitable though, it's interesting to see a game developer giving all proceeds to a worthy cause and slash the price too.

Calm down buddy.

This is my site and yes there is an affiliate link there. I've already donated more money to the Red Cross than I'll ever get from this post.

This way more people see it, more people benefit from it so i don't particularly care if you think this is spam. sorry.