Paleo-Hebrew is a real script. But one of the problems is that Paleo-Hebrew comes from Kabbalah. It’s also very confusing to some readers. Additionally, it dates from a time so early, that even Moses never heard of it. The Bible was never penned in anything like Paleo-Hebrew. There is some evidence that the tetragrammaton (YHVH) may have been preserved in its paleo form for some time, but that is merely decorative, and not substantive to interpretation. It is an issue in the Hebrew Roots camp only because some have become so enamored with the script that they miss the actual meaning of the texts they are reading.
Kabbalah is the ancient Jewish tradition of mystical interpretation of the Bible, first transmitted orally and using esoteric methods (including ciphers). It reached the height of its influence in the latter Middle Ages and remains significant in Hasidism.
Hasidism is an influential mystical Jewish movement founded in Poland in the 18th century in reaction to the rigid academicism of rabbinical Judaism. The movement declined sharply in the 19th century, but fundamentalist communities developed from it, and Hasidism is still a force in Jewish life, particularly in Israel and New York.
Paleo does not have many Torah scrolls on earth. In fact, you cannot find one complete scroll. Also, Greek paleo and Hebrew paleo are pronounced different.