I hunted through http://USspending.gov  to learn how much the US federal government spends on blockchain analytics. I looked at contracts and POs awarded to @chainalysis @ciphertrace @elliptic and @BlockCypher thru 2018.

Fun fact: because the CoinJoin bounty payout transaction to JoinMarket and Wasabi wallet was itself a coinjoin transaction with specially chosen inputs, the wallet clustering site walletexplorer.com now thinks that the coinjoin bounty address belongs to the largest wallet cluster (which used to be called MtGoxAndOthers and is now called CoinJoinMess)

https://www.walletexplorer.com/wallet/CoinJoinMess?from_address=3M8XGFBKwkf7miBzpkU3x2DoWwAVrD1mhk

The cluster contains nearly 9 million transactions and over 3.5 million addresses, including of course the CoinJoin bounty multisig address itself. Another demonstration of the fragility of blockchain analysis.