When the ether states that those who follow Satan will be asleep for a thousand years, he means that they will die, and their spirits will not awaken to the judgment until the conclusion of Jesus' millennial reign, in the same way that Satan will not awaken until the millennial reign has concluded.
A thousand years of death is ten thousand times more pleasurable than spending one day awake in hell. After the judgment, everyone should know that they will either be spiritually dead, or awake, in heaven, or in hell. The Lord God Almighty is a God of justice, mercy, compassion, true freedom, and genuine choice. The Lord God Almighty reigns.
The Lord God Almighty El Shaddai