The unclaimed SPS airdrop simply should be transferred to the users without the need of claiming. Some (or many) players can return to the game years later.
If a game is good, then the players can return to it years, decades later. For them, transferring their unclaimed SPS airdrop to DAO, or burning their unclaimed SPS airdrop is the same. They will lose it.
Probably many people have not even saw (or do not understand) this proposal, and the voting for this proposal ends in one day, and currently it looks like that it will be approved.