In the last days, there have been several posts which are commercial spam (mostly from India, as it seems) and have no link at all with mathematics. Is it technically possible that one of the moderators just deletes such posts as soon as a "flag as spam" comes in, without putting it on the revision list and waiting for 5 persons to waste their time with that garbage?
Moderators see spam flags in the flag queue, and they can delete a post with a single spam flag. They can also destroy a user with a few clicks, which will remove all their posts as well as their account, and eventually block the user on the whole SE network.
Of course a moderator needs to be awake and looking at the flag queue to notice the spam flags, spam can last quite a bit longer during timezones where fewer users and moderators are active.