So why try? Why risk another backdown if they try and seize his cattle? They'll work behind the scenes and make it impossible for him to sell his cattle or generate income to operate his ranch. They'll tie up his bank acounts, cut off his cash flow, seize whatever funds they can get their hands on, and do it all via computers and the courts. He'll wind up with nothing in the end.
The Feds might not go after Bundy again directly, but they are doing this sort of thing to many other people all over the country. There will be another stand-off somewhere else.
As for Clive Bundy, he’s not afraid to die, so freezing his accounts probably doesn’t scare him. He might have cash and PMs. He might even be able to make a living be becoming some type of folk hero and give public speeches or write a book.