[trafficlight]

I can't remember where I read it, but he has the same attitude about Steam. Notch feels that he has a large enough userbase that Steam (or Windows 8 App store) doesn't offer enough advantages over Mojang's homegrown distribution system.

[jeffool]

Likely his Twitter. I think he's said as much.

[thebigshane]

I think it was this interview (it was on HN a while back): http://www.rockpapershotgun.com/2012/09/15/future-talk-notch...

[trafficlight]

I can't edit now, but here's where I saw it.

http://www.pcgamer.com/2012/07/25/notch-on-why-minecraft-sti...