Being a “Game of Thrones” fan can be more than just a hobby, especially if you’re running a website dedicated to the hit HBO show.

Take Susan Miller, for instance. The 37-year-old Ohio resident is the editor-in-chief of Watchers on the Wall, a site dedicated mainly to reporting on and analyzing the series. Miller has a career but spends much of her time working on the site, whether it’s in season or during the off-season. “It’s like a full-time job,” she says.

“Game of Thrones” obsession has spread like wildfire since the days before HBO even ordered a pilot episode. Heading into its sixth season, buzz for the show, based on George R.R. Martin’s “A Song of Ice and Fire” novel series, is at an all-time high. Every little scrap of news goes viral, as demonstrated in a new Wall Street Journal article, and online fan communities are an integral part of the phenomenon.

Miller started reading Martin’s books in 2005, when a man she was dating insisted she read them. “I kept the books and not him,” she says. Miller has been involved in “Game of Thrones” fandom for a while now, starting out by posting on Tumblr, a microblogging site. Before Watchers on the Wall’s creation in 2014, she was a contributor to a site called Winter is Coming, which was founded by Phil Bicking in late 2008 – more than two years before the show debuted.

Traffic at Winter is Coming grew steadily in those early days, as Bicking’s site turned into a go-to spot for fans of Martin’s books who were desperate for information about the then-developing TV series.