My belief, while not original, is that
having more players wouldn't ruin the community
You're (referring to OP) probably thinking of MMOs such as Garry's Mod or TF2. Yes, people that know how to open the modding suite to defecate on it and then upload that... work to the workshop/addon section will always exist.
See ComicSans's stuffty addons, as he called them himself, for example. This community is small but there you go! A crappy addon!
Or perhaps an addon pack someone posted at the addons section, having made not one of the addons in the pack! It's in the wrong category like in that addon section in that modifiable game with the crappy modding community you dread so much.
I don't think it'd be good for anyone's sake for the game to get a million new players over the course of a few days but 15 thousand would probably turn the game toward the right direction, and secure plenty of ancestors to replace us when we eventually catch a strain of Alzheimers and forget how to use a computer to return to whachammacallit.
...Actually, forget that last one.