How many people and How big are the amounts of funds that are transferred through them?
Virtualcurrency mixer/Tumbler/ BitMixer* is a service that mixes potentially tainted coins with other coins with the intention to complicate the trail leading back to the original source of funds. Mixers are often advertised as a service to improve the anonymity of popular cryptocurrencies, however, they have also been used by black markets and some criminal elements. The most popular tumblers use Bitcoin, Ethereum and Litecoin.
In traditional financial systems, the equivalent would be moving funds through banks located in countries with strict bank-secrecy laws, such as the Caribbean or Panama offshore banks. Digital currency tumblers usually take a fee of the total coins mixed ranging from around 1-3%. Some of the most popular tumblers are: https://bitlaunder.com https://coinmixer.net https://bitmixer.io* https://cryptomixer.io
From the total volume of over 75,000,000 USD in Bitcoins traded each day on exchanges we can estimate that about 10% of the original funds are hidden through various mixers. So they’re in frequent feature among a percentage of users and the total market cap around 7,500,000 USD daily. Noticing that the fee may be 2%, there’s around 150,000 USD in revenue for their operators each day across the entire market.
As an example you can check the latest donations to Bitmixer* with Coinfirm’s platform: https://coinfirm.io/bitcoin/am... This content above is an excerpt of a larger report prepared by Coinfirm.
*Bitmixer owners lately realised that Bitcoin and anonymity don't go together as well and thus decided to terminate their operation.