this was the OG iteration of Netlify called BitBalloon - visit a page and drip a folder in and have it be hosted. critically, you can do this without signing up first - which is nice for user acquisition
It's also nice for pirates and pornographers. :D
That’s exactly where my mind went too. So easy for this to be exploited.
Don't forget data-exfiltration, malware hosting, and C&C!