The other replies to your comment don't seem to address your fundamental point that the Kardashians and their kind are in a different category than other celebrities. Their skills are not acting or singing or sports, but rather generating news to keep themselves in the headlines. I don't really recall this being a category until the start of reality TV, and even then it was short-lived after the shows ended. It wasn't until Paris Hilton that I was really aware of how powerful this category can be, and others have figured out the formula as well, leading to the Kardashians and other influencers. The successful ones have the social intelligence to know how and what kind of outrageous or salacious news to generate to attract people who like to feel envy, indignation, and a sense of superiority to famous people to watch their antics, and thus feed the hype machine that keeps them in the spotlight and allows them to reap the rewards of that spotlight.