It seems like the Kardashian-Jenner hype is fizzing out. Last year, we've seen them in dozens of magazine covers and new apps. They have also garnered more television airtime and more attention from the fashion industry. However, magazine sales with them as cover show otherwise.

WWD reports a dramatic drop in sales when members of the reality family posed on the covers. Last year's November issue of Cosmopolitan, featuring Kim, Khloe, Kourtney, Kendall, Kylie and Kris as cover, saw an 18 percent drop in newsstand sales. The single-copy sales average about 531,086 copies. The 'First Family' issue sold only 436,500 copies.

Meanwhile, Kim's Glamour cover and Kendall's GQ and Allure covers also sold worse than average for all publications. Kim's Glamour cover saw a 14 percent drop, while Kendall's GQ's cover photo got a lot of buzz online but only sold 10,000 copies less than usual. Allure also sold 4,000 copies less than average.

Not All Flop

Kim's July Rolling Stone cover that features the brunette wearing a sailor hat and baring her ample cleavage sold 89,100 single copies more than the magazine 2015 average of 73,354.

Kylie's May Teen Vogue cover sold 1,000 copies more than average, and Khloe's September Women's Health cover beat the average by 2,893 copies.

Their dad is the biggest winner of all, giving Vanity Fair a 264 percent sales bump when she debuted the first image of herself as a woman. It is considered as one of the best-selling magazines of the year with 432,923 single-copy sales for its July cover. This issue sold 268,014 copies more than Kim's Glamour issue (which sold 164,918 in single copies), which was on newsstands at the same time.

Khloe also covered Redbook and Complex magazines this year, while Kourtney had her only gig with a cover at Fit Pregnancy, though newsstand sale numbers are not available for those publications.

Is this somehow a sign that the Kardashians have lost their appeal?