Here's a somewhat older thread that addresses this:
Also, here's an excerpt from the "Support" section:
Instant posting of reviews . Currently we have to manually check each fragrance review for inappropriate content submitted before we post it to the site. We would like to think that people who support Basenotes will only post suitable reviews, therefore as a Supporting Member your reviews will appear automatically. (Reviews will still be checked for inappropriate content)
I'm sure your reviews are lovely, FroFro. We do keep our Leader quite busy these days, what with updating the database, updating rules and regs, keeping Basenotes fresh and interesting and informative, and heaven only knows what all else goes on behind the scenes!