According to TMZ,
“Chyna and Rob know that Kim scored millions when her ill-fated wedding to Kris Humphries was televised. They know they won’t get Kim’s money, but they feel more than worthy to get what Kris got, and they’re insisting on 7 figures. Chyna is on board to let Kris Jenner handle the wedding plans. No one can squeeze money out of events like Kris, so everyone wins.