nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqlvpslyqgz2un0lsuln4m9u0c8dh43s0ugu9xkumqll64eeluvuksc5fnv8 (nprofile…fnv8) all it would take is one seized device not secured with correct PIN, that would give away the IP addresses of the servers.
I don't think anything particularly high tech went on - "les flics" simply said to the hosting company "you help us, or we put you out of business and the bosses could even be arrested themselves as accessories to many serious crimes", and they let the authorities do anything they wanted with the servers as "good corporate citizens" (its happened before in UK with Indymedia, which was a relatively harmless activist website)