I doubt that the heavily tracked coins will be sent to such swap services. I think it's unlikely that the thieves of such a massive amount would trust it to a service that gains full control over the cryptocurrency, even if only during the swap. For the thieves, the fact that b1eXch doesn’t collect user data shouldn’t be as important as the fact that b1eXch itself will have the technical capability to steal all those funds. If I were them, I would clean such a haul using atomic swaps.
Most the services called atomic swaps use thrid party centralized services to process bitcoin deposits.
I dont think they have many options to make those coins clean...
The mixing of stolen coins with Coldcard
has begun. It goes through Wasabiwallet, so it's not as sophisticated as one might have expected.
One part was swapped into ETH, which was later sent to Tornado Cash
