>This involved taking covert control of Hansa under Dutch judicial authority a month ago, which allowed Dutch police to monitor the activity of users without their knowledge, and then shutting down AlphaBay during the same period. It meant the Dutch police could identify and disrupt the regular criminal activity on Hansa but then also sweep up all those new users displaced from AlphaBay who were looking for a new trading platform. In fact they flocked to Hansa in their droves, with an eight-fold increase in the number of new members of Hansa recorded immediately following the shutdown of AlphaBay.
https://www.europol.europa.eu/newsroom/news/massive-blow-to-...