Only cash is anonymous.
Authoritarian societies control the way their subjects use digital means, looking at any communication, if not directly spying any device. They would be able to see somebody accessing such a service, marking the person as suspicious and worth of being more tightly controlled. It's only in our 'free' countries that such systems can be accessed with few controls if any. I think these service are mostly used to launder money or to evade tax, are nefarious and more a threat than a good thing.
Biting the hand that feeds IT
