Many professional authors of role-playing games have their own web pages. Typically these have a lot of semi-official supplemental information that just didn't get published, errata, and links.

The difference between a website that should be here, that of a professional Roleplaying Author, and just an amateur hobbyist who has written her own campagn scenarios for her group is somewhat subjective, but is like the difference between an Author and a Writer. One has a noticeable quantity of work professionally published, the other hasn't.