How come Eminem was allowed to appear on

[Shadizz]

this track, when we know that getting an Em verse/hook must be expensive as fuck and that
Paul/Interscope wouldn't let him appear on any projects that aren't "mainstream" ?

[eminemFV]

em does whatever he wants.

[SliK]

Maybe he was allowed to give hooks but not verses. Royce only gets hooks, X got a hook I think?
Are there many verses he has given to "low profile" artists? I know since his new contract he had provided verses to labels like YM, but I can't think of many verses he has given to non-label mates.