Use a Custom Domain Name
From a blog post by Manuel Moreale:
Please, for the love of all things web-related, if you decide to do anything online, get yourself a domain name. Don’t rely on the 3rd party domain provided by services like Blogger, Substack, Tumblr, whatever. Yes, it’s an extra cost but owning your URLs is important. If Substack dies tomorrow, all your fancy-cool-name.substack.com URLs are gone. And all the links scattered across the web that were pointing to them are now broken.
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