Well, you never know! I've noticed female growth rates can be phenomenal, it's not impossible that this is to bring them into breeding condition as soon as possible. As the males have nuptial pads and as ever ever are in the 'the mood' it could be worth a try.
HOWEVER, placing sauvagii in a rain chamber is fraught with danger, nothing kills them quicker than humidity so be VERY careful if you are going to attempt it.