It's a question of scale. Laundering a small amount of money via a business entity that accepts cash isn't hard, but people get caught when they get greedy and

It's a question of scale. Laundering a small amount of money via a business entity that accepts cash isn't hard, but people get caught when they get greedy and start trying to launder implausible amounts. TC clones can probably fly under the radar with a small transaction volume, but any attempt to launder large sums would get caught pretty quickly (with standard forensic accounting techniques used to trace the beneficiaries).