The forum does not have an anti spam bot. The mods and admins to around and delete spam comments and also trash useless threads in the forum.
They are also aided by members who can flag a post by reporting it and they take action (they are pretty efficient for you to think they're bots)

That's also how the merit works, members and selected source go around and look for worthy and educative posts.
I've seen bots do lots of things but designing such an EA would be very tasking.
If you think your posts don't get noticed, then consider venturing to other boards and fully exploring the forum.