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by Nadya 3076 days ago
Think of it as shorthand for a list that expands to be infinitely large. [0]

People would consider a blacklist that includes ` * .example.com` to be a list that contains all potential subdomains of `example.com`. With ` * ` being seen as shorthand.

E: Spaces around the asterisk added to avoid HN formatting.

[0] Technical limitations aside, especially in the context of URL matching since URLs have a maximum character length.