Usenet newsgroups are _not_ to be used as advertising bulletin boards.
Usenet is pretty firm on this issue. Up until this point, postings that are
in the advertising vein are tagged with a disclaimer:

[MODERATOR'S NOTE: Commercial postings are offered on this newsgroup as a
public service. Their appearance here does not indicate endorsement by the
moderators or by the USENET or its administrators.]

Postings used as advertising, but phrased as "Re:" to discussion and/or
announcements _will be rejected_.

sci.virtual-worlds encourages _informative_ discussion regarding products
(PROD:), new product announcements (NEW-PROD:), press releases (ANNOUNCE:),
and information and software available online (ONLINE:)

Submissions will be rejected on the following criteria:

  1. Lacking _sufficient_, relevant information
  2. Flames at competitors, etc.
  3. blatant advertising
  4. replies to "Announcement" postings