I seem to have missed something, in that I don't get one moment of the story; given: in April 2011, he received a certified letter from United, cheerily inform

I seem to have missed something, in that I don't get one moment of the story; given: in April 2011, he received a certified letter from United, cheerily informing him that because he had taken advantage of the system his frequent-flyer account was permanently suspended. He was banned from flying, he recalls the letter saying, unless he paid the company $4,755 — the amount it claimed as losses through Schlappig's techniques. [...] Schlappig has repeatedly offered to send United a check but has gotten no response. -- so, how he continued the Hobby afterwards? Did he switch to a different airline? Can anybody help me understand?