It appears that only SAND holders on Polygon can vote on the proposal.
LAND owners on Polygon cannot vote on the proposal.
Having gone through DAO voting processes, typically a discussion happens first, prior to a snapshot being taken. Once the discussion is nearing completion, then a snapshot gets taken for a vote. In this case, the snapshot was already taken and discussion is now an afterthought.
My suggestion would be to enable discussion to happen first.
One could say that this forum article was created on May 21st, and there should have been enough time to comment.
However, the Sandbox DAO was only announced 8 hours ago: The Sandbox on X: “Introducing The Sandbox DAO 
We’re shaping the future of our platform as a bridge between gaming, entertainment, music, art, and more! Follow @TheSandboxDAO for more. IT’S NOW YOUR TIME TO GOVERN! https://t.co/jFaf1VqJj1 https://t.co/ZQaoUPMnpP” / X (twitter.com)
My suggestion would be to jettison the first three proposals as they’re already broken by not including LAND owners and also you haven’t given the community enough time to discuss the proposal (8 hours as of this writing, it was just announced). And then think about how they want to vote on the proposal based on community discussion.
Looking forward to advancing this conversation further.
-brian