Kim, Foxy, and Nicki (and Lauryn) certainly did sell like the biggest male rappers.
Kim and Foxy never sold like the biggest male rappers. Ouy of that list, Nicki and Lauryn are the only ones and with Lauryn, it was one album.
Kim's debut dropped in 1996, it didn't sell what Pac or Nas was selling. Same with Foxy's debut.
Foxy dropped her sophomore album in 1999. It only went platinum when Juve, Eminem, DMX, Jay Z, and Nas were all double platinum or more. Kim's sophomore dropped in 2000 and she wasn't doing Jay Z, Nelly, Eminem, Dre, Ja Rule, or Ludacris numbers.
Foxy's third album dropped in 2001. She was not doing Jay Z, Nas, Ja Rule, Ludacris, or DMX numbers.
Kim's third album dropped in 2003. She definitely wasn't doing 50 Cent, Jay Z, or Ludacris numbers.