wasn't this sort of thing in the works for giantbomb a while back? i could have sworn during one of the old radio shows, the ability to let users create like custom sites very simply was touted as a feature.
regardless, that platform he's building looks amazing, and i hope they succeed. could be a real breakthrough for web design.
We did want to build game-focused mini-sites that users ran. We planned on setting them up ourselves, so it wasn't a platform per se. Getting the company sold then having to rebuild the sites from scratch kind of slowed that initiative down.
I have always wanted to build something like Webhook though and talked to just about any engineer that would listen over the past decade. It's mostly come about from my own ineptness when it comes to backend code. I just wanted to focus on the front-end part of the site.