This is essentially the legal form of robbery and scamming.
Because US import taxes are clearly defined, the system allows me to pay all duties on my side before the package even arrives there. And once I realized through the customs documents that the actual taxes people were being charged were only around $6–7, while the remaining $30–40 were mostly made-up “operational fees,” I started covering all US import duties myself just so people wouldn’t get exploited.
But now, ironically, because I disrupted that system, I’ve started encountering difficulties during customs clearance that I had never experienced before.