more than that, the number itself is inflated. if you read through their methodology, so much of it is based on unproven heuristics. they are making assumptions about peel chains many, many hops out. they assume that mixed/coinjoined outputs that ended up at [OTC broker--->huobi/binance] were automatically the "illicit" funds they were attempting to follow. the list goes on.

what this boils down to is chainalysis talking a bunch of shit, and hyping up their blockchain analysis capabilities.