But it also means that any mixer could be the next target. It's not too strange if a mixer is involved in money laundering, the larger the mixer, the harder it is to judge. Who knows when they started investigating
Yes, any mixer could be the target, the authorities are most likely watching them all, and they are potentially at risk of getting seized, but that does not mean they are going to be seized. There was 4 years between bestmixer getting seized and chipmixer getting seized.
I agree that the bigger a mixer gets the more attention it would get.