Besides proxying to try to mask their activities, wouldn’t those playing host to bad actors have to have some insight or notice some abnormal activity that might give away that someone may be abusing their services?
Or is it that there’s a mix of a financial & legal advantage to remaining as ignorant to that activity as possible for as long as possible up till push comes to shove & they’re being served a warrant?
Those schemes are more fly by night and don’t last long.
Websites that sell illegal products are almost always based in a place where the product isn’t illegal or enforced.