He built a website. He didn't dictate how people used it. That was the point. He was charged as a drug kingpin with mobster era consequences. His sentence didn't fit whatever crimes he did or didn't commit.
Trump killed Net Neutrality during his first term and you think he would use it to justify the actions of someone running an internet black market that trafficked in drugs, prostitution and murder?
If someone facilitated a transaction of goods that were illegal between two people and received a cut of the sale, do you think they deserve some culpability?