This process involves having their future self, assuming their future self is still alive, being sent back to the year 2044 and following through on the same process, killing their future selves. They are awarded gold bars instead of silver, and their contract/employment ends. What throws a monkey wrench into this is that a loop could potentially run/escape. This leads to complications beyond what anyone could possibly imagine. There's a side incident before the main character experiences this happen. It occurs to his best friend and it didn't end well for any parties involved. Long and short of it, his best friend was sedated and had limbs slowly removed until his future self/loop was lured back and then killed. It can be presumed that he was kept in a comatose state so that way continuity issues with the future wouldn't become present, but it's hard to say.
The majority of the questions regarding freewill are involved with the main plotline, and Joe's attempts at closing his loop. It is revealed that his future loop is somebody who already had "completed" his loop at some point. In and of itself this presents some serious issues of recursion and fate. As in, how many times has this "loop" in its totality played itself out? Could the loop potentially be stopped? Or are the players of the loop forever fated to play the roles that they do? Anyway, Joe's loop comes back, and for brevity's sake we'll call him Old Joe. So Old Joe comes back and immediately attacks Joe, knocking him unconscious, and leaving a note for him to get out of town. Joe decides to run back to his apartment and gather some supplies, hoping that he can "make things right" and be able to close his loop in a somewhat delusional fashion. .
Eventually, after some chasing, the two meet in a somewhat civil way and Old Joe's motivations to keep on living are revealed. He apparently moved to China after prior events and after fighting a drug addiction and going further into crime he found a wife.