*shrug* All I know is that I'm out 2 bills and I've been back and forth with them via their customer service email for the better part of a month and they basically said, "Tough luck, buddy. You're on your own."
If I had to venture a guess, TheChosenPrime (again much like a lot of other stores and businesses out there) provide "great customer service" as long as it doesn't impact too heavily into their profits. So, your order came with a damaged part? No prob! (The replacement part probably only costs a couple dollars max assuming the manufacturer didn't send it over for free). Oh, you want to return your order? You got it! (At least they get the item back, and they might get return shipping cost or even a restocking fee outta ya.) But if your package gets lost? Er... Sorry. Good luck.
Lost packages suck cuz the store's options for "good" customer service is basically to either send you a replacement on their dime, or refund you your money since you didn't get your order. That's a big hit. And, sure, they might be able to recoup some of that hit via shipping insurance, but that's assuming they even paid for it (which they might not have in this day and age of free shipping). Some of the Japanese stores are smart at least and often force EMS shipping on you since EMS covers up to 20,000 yen.