The "Guidelines regarding advertising and Drupal projects" page has been in an "incomplete" state since 2009.
The only part that's really missing, as far as I can tell, is an example of a theme that makes it very easy to remove the credits for that theme (i.e. by having a theme setting for them).
Otherwise I think the page is in pretty good shape. The comments raise some questions, but I think the document actually addresses them. e.g. aclight takes exception with a policy that Drupal core breaks but 1) Drupal core almost always breaks our policies since it is by definition special and 2) core makes the block easily removed.