Having a visible, promoted online storefront does mean that authorities may be able to take the shop down, he said.
"They do get taken down, but usually pop up somewhere else -- especially the big ones," he said. "They have the means to move around if they get taken down."
But relocating a shop does pose logistical challenges, he added, and smaller operations, once they get taken down, sometimes stay down for good.
"It really depends on whether the criminals have the means to keep the website up," he said.
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