Why don't you grab a spot? :)
The participation is great, but the empty spots are there because nobody knew how big the map was gonna be and for security they removed the noble pledges. You wouldn't want to buy a spot that is not there. And we should leave open spots to fight over.
We in Europe have a complete empty kingdom to fight over. It's gonna be one big battle royale, Unless some one buys it in the last minute. In that case we will have a king to fight with.