A genuine question.
There is sub-community of just-for-fun conceptors which make a new champios and items just for fun. I personally made 1-3 new champions every day but have slowed down a little.
Does the world benefit from these ideas or are they just waste of time to be posted on boards?
The concepts and theory crafting are fun and thought provoking to read. I think they provide value.
I'm not sure if Riot pays attention to them though.
Void fizz was a community created skin. I'm sure there are more
Nocturne was in part the idea of someone on the old forums back in 2010. The username of that player was LeviathanUnbound. Nobody ever receives credit for champion concepts though.
The champion was called Nocturnos, Shadow Stalker.
Mostly it's for fun. Riot doesn't take community champion ideas (that's why they have designers on payroll) -- it's just too hard to view all the ones out there. There have been one or two skin suggestions that ended up being popular and probably inspired in-game content, but that's SUPER rare.
If you're designing for your work to be seen by Riot, then the creative bits of the board probably won't satisfy you. But I wouldn't call it a waste to have a community that wants to share their art, music, and design! Plus, as someone who has used my amateur design work to actually get interviews in game design, it CAN still be useful to improve your skills. :)
Riot has a stipulation somewhere that they own all content posted on the boards, I'm sure they use it as an idea well if they're ever stumped.
