It's not an official thread created by Dave or the mods, so no, it's not really their business to monitor. It would be like me creating a thread but asking that people don't put gifs from The Simpsons in it, and then being annoyed that the mods don't delete Simpsons gifs.
On the bright side, even with the numptiness of people who post the same code 5 posts in a row, or can't read the "rules" in the header, it's still a ton easier to scan for new codes than this thread is... so at the end of the day, it does still work.