Today I learned you can buy(?) software that runs on virtual robots (called turtles ala Logo) that a Minecraft mod lets you craft.
I don't even need to look to know that someone is writing a version of Minecraft in Lua to run on a computer crafted in Minecraft.
The turtles can talk to each other, via an in game net or the real internet. I do so hope the singularity is triggered by a hivemind of virtual lumberjack robots.
Edit: Looks like 'premium' probably doesn't mean 'paid'. Unless they're doing the payment processing in Minecraft. I hope they are.