Have been trying to corroborate this prison planet concept as I simply do not want to believe it. Found a tremendous amount of info on Reddit and urge you to explore the prison planet thread. There you will find posts from two spirit release and past life hypnotists, Tena Dodds and Karen Baquiran. They found their clients were being tricked into reincarnation that had no need for an “earth school.” If they asked the “spirit guides” to show themselves how they looked PRIOR to this encounter they appeared as humanoid lizards. They also say the Galactic Federation tired of fighting them so during the Orion War placed them on earth with their (not reptilians) grid. It imprisoned the lizards but us as well. Here is a video from Tena and Karen. At 1hr mark they mention Federation placing grid on Earth. https://www.youtube.com/live/a2Gd4t1HujM?feature=share
The grid was created by the Pleaidians to trap humans here.