I think the only way to enforce would be a) for mods to be able to see who nominates
But that's not how AO3 works. This isn't a Yuletide thing, it's a AO3 thing. AO3 have to rework the entire nomination process for all exchanges. And while they've changed things to give Yuletide specific functionality before, I really doubt that this would be worth it.
And I don't want to see the world burn. I just want to nominate a variety of things so that when sign-ups come around, I have fandoms I really want to request. Narrowing them down before nominations doesn't work for me.
I don't think it would solve anything, anyway. The assumption that there are unmatchables because there are too many nominations is faulty from the start.
Re: Four IPHs left
But that's not how AO3 works. This isn't a Yuletide thing, it's a AO3 thing. AO3 have to rework the entire nomination process for all exchanges. And while they've changed things to give Yuletide specific functionality before, I really doubt that this would be worth it.
And I don't want to see the world burn. I just want to nominate a variety of things so that when sign-ups come around, I have fandoms I really want to request. Narrowing them down before nominations doesn't work for me.
I don't think it would solve anything, anyway. The assumption that there are unmatchables because there are too many nominations is faulty from the start.