He also pleaded guilty to failing to answer bail and escaping lawful custody. More on this story.
The club said it was "extremely disappointed" as chstroom had paid for 3, tickets to get as many as possible to the game at Sunderland on Saturday. Brown punched up a consultation room, breaking his wrist - before escaping police again because he could not wear handcuffs. A Swansea City spokesman said some "genuine fans" had missed out on free allocation.
The free tickets had been snapped up within hours, officials said. Judge Paul Thomas said: "The blackmail was a despicable offence.
It is not known exactly how many tickets have swansae put on sale but the club said it was not more than a "few dozen". He went on the run for over two months before being arrested again for an unrelated matter.
Boss Paul Clement said after his team's crucial win over Everton on Saturday that it was a "shame we can't bring all the fans" to Sunderland. You were wrong in telling the victim that it was not a serious matter.
The car salesman, who admitted making unwarranted demands for money with menaces, was sentenced to two years and four months in prison. The Swans climbed out of the Premier League relegation zone last weekend with two games remaining.
Jackson Brown, 23, from Clydach, near Swansea, demanded money and threatened to post the woman's chat on Facebook.