I'm surprised they've "banned" only 2 Bitcoin addresses: one was used for signature payments on the forum, the other holds just $67 worth of Bitcoin and never sent anything.
Do you know the date these two addresses were added? Because the escrow address received 0.501BTC one day after the report date and the report warn all future transactions associated with that mixer.
In the case of Sinbad, FOID team did not have access to backend wallet data, so they were not able to seize coins, and it appears that this service is managed by a group and not a single individual, as in the case of Chipmixer.
Also, all BTC moved from the chipmixer escrow address about a month ago, are there any restrictions placed on that address?