Blue Wolf
Natrually if a moderator sees any spam he/she will take care of it immediately but the vast majority of spam gets reported by regular posters and the mods act quickly (sometime stepping on each others toes) getting the spam moved to Site Promotions.
The system works good and all the credit belongs to vigilant posters who care enough about the site to report the constant influx of spam a site like The Rx. is bound to attract.
Thanks for asking.
wil..
PS. To report spam click on the report a post icon bottom left of the spam post and type a brief note and a mod will quickly take action.