I see 'em every couple days. I do, however, only use the "New Posts" link to read and I usually can tell pretty fast we've got new spam as you'll see several OLD ass stickies get bumped into the new posts half of the page. After a quick WTF, I go report one of 'em. No sense reporting multiple posts by the same spammer as I'm sure the mods see "ad spam KILL HIM" in the report and nuke the rest of that person's posts, too.