https://home.treasury.gov/news/press-releases/jy1933#:~:text=Sinbad%20is%20believed%20by%20some,from%20customers%20of%20Atomic%20Wallet.

I think this is quite insightful. It seems it has not yet been seized, but been put on a list for sanctions and everyone interacting with the sanctioned entity is facing massive trouble! Read the whole part about Sinbad.