I think the reference is to the lack of "presence" in Dooms work. As if he just sells old verses to people instead of actually working with people or making anything new. I have to admit as much as I like Doom, most of the projects he puts out, and his guest verses, feel like they could have been in the vaults for years.

Even this project (which I love) feels a little like Czarface just got their hands on some doom verses and assorted audio, then crafted an album around it.