In an ideal world, this would be a union.
In (what I worry might be) the real world, the word union conjures unhelpful barriers to action.
I'm less interested in fighting idealogical battles. I'm more interested in achieving a practical goal - getting a large group of people to say no to leetcode.
My guess is more people will say no to leetcode if they think of it as a general group anyone can join. This allows a larger amount of people to ignore idealogical barriers they might have to joining. So for now it's a "group/job board".