different distances are Not usually scored against each other- 10 metres is for kids and women as individuals.Though if children or women are in a team they all throw at 20 metres.
Spanish, machismo - nuff said
But in ibiza their regular weekly competitions are usually 5 shots at 20 metres and 5 shots at 30 and the combined score is taken for all 10 throws.
So in that case they are scored together.
try slinging at 30 metres - even hitting the quadro is bloody difficult.
And it does change the scores as most people will fail completely at 30 metres to hit anything.
I'll add your option but a 30 metre quadro is definitely worth 2 points