Why were the Kardashians so much more successful than all the other wannabe social climbers?

I know, I know very, very gay question. But, it is kind of insane when you think about it. There's thousands upon thousands of people who have tried to build a business empire (lol) like they've done. All from seemingly no talent. Apparently, Kim is worth 1.7 billion dollars, just to put that into perspective, when Paris Hilton and all the others have faded. Why are they so much more successful than the rest. I'm asking here because you lot tend to have good takes on the world (I'm desperately resisting the urge to make a joke, it's hard).