About ten years ago, I used to publish a blog I made using RapidWeaver to my .Mac iDisk. Correct me if I’m wrong, but I’m pretty sure I could use my own domain with it. Either that, or I pointed my own domain to it. The ability to publish a website existed under .Mac via the iDisk.
... it was such a runaway success that Apple pulled the plug on both the .mac domains and iWeb/iDisk. Given the multitude of social media options on the interwebs today, this concept is no longer viable.