Like Pommie, I haven't been very active on the site for some time now but when I have popped in, I haven't really noticed any spam.
Why?
Most likely that the mods have already spotted it, or a proud member has reported it and it has been swiftly dealt with.
This site, for me, is probably the most relaxed and tolerant of the popular electronics sites out there. If a post subject is bordering on spam, dangerous, or illegal, you can bet your boots that someone will step in and say so and say why, or report that post to those who freely contribute their own spare time and have the unenviable task of making the final decision on whether a post stays and is allowed to evolve, or nip it in the bud.
If it's a blatant spam, dangerous or illegal post, then I fully trust the judgement of the person making the decision to label it so and if the post is left with the OP's name plus a mod edit, I have an idea who to watch out for in the future.
Regards.