It's not exactly a bad idea though. More people creating CS maps the more the community thrives. It's easy for great maps to be lost in the workshop.
Maybe a 24 hour gamejam to get a map to a playable state and then the organizer fund the best 3 ideas or something? I can get an idea down in hammer pretty quickly- it's the lighting/textures/props and tweaking that takes the time (I'm sure most will agree)