You're right that I'm assuming there's a thorough DD process associated with those investments. It's possible ML just showed them smoke and mirrors, too. But I don't think so (partially because I've spoken with people who've seen the demo -- they're under airtight NDA, but they're clearly not skeptical of the company).

After some introspection about why I think this way, perhaps it's the sum of money that makes it seem less risky... and but it could be an artifact of scale: most investments of that size are growth capital or PE. Instead, we're seeing risk capital assigned to a potentially enormous market, so it's scaled up, too. Almost like the world's biggest seed funding? (Take that, Clinkle!)