No, there is no use case where this is feasible on the public web. Even a small site with a strange URL and few visitors will be attacked in exactly the way described in the blog post if they try to use this. I'm sure some bot maintainers are already pushing for a detection of this enormous security hole.
There's lot of possibilities there; the demo page returns a tmp url that will work for a while with the data transfered, so you could use the service to distribute files in parts of 30MB max...
Do not do this.