Well if that's the case Nicki owe Kim & ms. Wallace 4 using beats/concepts on her old Mixtapes! Yeah nicki said she made a mill of her Mixtapes... Plus I do think lil Kim knows the ends & out of the music business. Her mixtape cannot be sold on iTunes or record stores, & her label could not distribute BF. Check out how Cassidy made his money on his mixtapes
And if thats true then you right she owe's money, but where nikki will get off is she never publicized she was selling a mixtape for a price, Kim is on Hip-Hop DX with it's going for 9.99, im not excusing nikki but show money is different then revenue generated off of a mixtape/cd. and kim being in the game as long as she has, if she doesn't know the in's-and-out's then she's retarded.
but just remember recently how they cracked down on DJ Drama for his mixtape sales, mixtape game was good money all the way up until then. I remember buying lil wayne dedication 2 (before wayne became dirt) and now, you can't charge for a mixtape unless it's all original material or the material on it is leased to you.
Edited to add: On top of that, these deals that these rappers are in. will mean that the money they make off the mixtape the record label get's a percentage AND it does NOT count towards the album count they owe on their contract.
Prime Example: Nas & "Lost Tape's Vol. 2", research his story on this and he will explain as to why he has not released "Lost Tape's Vol. 2"