I didnt pay anything for any of the verses on my Compilation, its 27 rappers on there, I have Mars, ADR LaVey, Redrum, Cali Sick Record homies, Big Oso, and hella others. I think it just depends on how close of a connection you have with them and also how much of a guarantee that that record will sell. I just promised them a copy of the album when it came out. Much love to everybody that got on it!