As the other commentors mentioned, there's nothing improbable about it -- but there shouldn't even be anything too <i>surprising</i> about it. It's not even as if Minecraft is the first time this happened <i>or</i> the most extreme case of it happening. It's probably the most widely-publicized example though, at least among the tech media.<p>Of course, this doesn't at all reduce the value of Minecraft's success -- it's just that Minecraft is not some singular magical exception in a world of failures. This has happened before, and it'll happen again, and it'll happen bigger.