@Synchronice,
Other mixers may be very willing to work with "bad money" and not think twice or have connection to states like NK (even if unconfirmed). So that's why and how they succeed. Judging by the number of refunds we issued with the help of minerjones it was basically only the signature participants who had funds on whirlwind.
As it seems, Hhampuz was right.
Sinbad.io (Sinbad), a virtual currency mixer that serves as a key money-laundering tool of the OFAC-designated Lazarus Group, a state-sponsored cyber hacking group of the Democratic People’s Republic of Korea (DPRK).
But I still have a question. How effective really was signature campaign for whirlwind? Also, when was sinbad.io website as a fully functional mixing service created? Sinbad.io started advertising on this forum in 2022 and it looks like they become super popular and millions of dollars went through their mixer. Does this mean that signature worked for them? If yes, then is it false claim when whirlwind owner says that signature campaign didn't work for them?