There is, of course, a reason why none of these publications is particularly popular, especially in comparison to The Hobbit and the Lord of the Rings.
The biggest and only relevant reason being that The Book of Lost Tales, Unfinised Tales, The History of Middle-earth
, etc., are all more like reference books, full of old scraps and notes by Tolkien, edited together to flesh out Tolkien's ongoing development of Middle-earth. They're not novels like The Lord of the Rings
and The Hobbit