Disclaimer: I'm only an active contributor to Charcoal SE project. Prior to flagging my first spam here, I didn't even know "Drupal" can be a word.
I had my first declined flag on Drupal, and it's on an answer I perceived as spam. (Can't provide a screenshot as I lack the reputation necessary and it's been deleted) I also left a comment pointing out to the answerer to disclose any affiliation they have with that website.
Long story short, that post was caught due to the username being similar to the website linked, which is a pattern observed in a lot of unquestionably spam posts sometimes hard to detect. Furthermore, the username is hardly just a random common word in language which accidentally happened to be a site name as well, so this can hardly be a coincidence. That makes the post suspicious, and likely spam, i.e. self-promotion without proper affiliation disclosed.
I'm not upset in the slightest, as I have enough helpful flags to compensate, but I'm curious as to why the post couldn't be perceived as spam. The post is now deleted, which could mean it was considered NAA (Not-An-Answer)? Can't tell for sure.
In other words, for the sake of consensus, is a 'username similar to website in answer', perhaps in one of arbitrarily short length, from an unregistered or 1-rep user, without proper disclosure of affiliation spam?
Footnote Currently the post holds two True Positive feedbacks in that spam repository I linked to, and I was certain it's spam. If proven wrong, I would change the feedback to NAA, of False Positive if needed.