Wow this is pretty cool! Seems like a great tool to throw onto an existing CMS, allowing clients to retain the flexibility of editing their website directly.

Does this deal with/forward dynamic content on the same domain? Or do admin panels, etc have to be hosted on a separate subdomain?

EDIT: Wow, Miguel is even completely transparent (https://sitesauce.app/open) with his revenue and costs. That's incredibly inspiring to see from an 18 year old.