Ebony is actually rarely jet black. 10% or less of harvested ebony is. Ebony can actually be quite stunning with its brown streaking and color variations. Since the jet black stuff is rare and expensive, you are seeing more manufacturers using the streaky browner stuff. You can always tell a brown piece of ebony from a piece of rosewood by the size of the pores.
I've read a lot of companies dye their ebony boards, and that MM don't? My Dargie has a black as night ebony,and my Roasted Black Sugar has some very obvious grain showing, both play good, so that's all that matters