It is not exactly clear what Kendall and Kylie Jenner are famous for. They just are.
Every month or so, the Jenner sisters just pop into the news over something or other. If other people did the same thing, no one would care. It would not be newsworthy.
It's plausible that their skill at getting that media attention, is what they are most famous for doing.
However, the sisters recently learned that there are bad ways for them to use that skill, because it can get them sued by an estate.
TMZ reported on this in "Notorious B.I.G. Estate Warns Kendall & Kylie Jenner Lawsuit's Coming, Unless."
The sisters created T-shirts with the images of deceased rappers Tupac Shakur and Notorious B.I.G.
They superimposed their own images and logo over the rappers' images and offered the shirts for sale on their website.
It is not clear why they thought they could do this, since they did not seek permission from the artists' estates to use the images.
Notorious B.I.G.'s mother was deeply offended. His estate's attorney sent the sisters a cease and desist letter with a deadline to stop selling the shirts or face a lawsuit. The Jenners quickly complied and took the shirts out of their store.
The lesson for the sisters here and for anyone else, is that just because a person has passed away, you cannot use his or her likeness in your own commercial enterprises without permission.
The estate of the deceased holds the rights to that likeness and can sue for infringement.
Reference: TMZ (June 29, 2017) "Notorious B.I.G. Estate Warns Kendall & Kylie Jenner Lawsuit's Coming, Unless."