While American Sniper continued to pick off box office records in its sixth weekend, as well as any new wide release in its path, we saw box office anomaly: Warner Bros.’ IMAX presentation of HBO’s Game of Thrones made $1.5M from 205 playdates for a per-theater of $7,323. While not necessarily an IMAX opening record of any kind, what the experiment proved was that die-hard Game of Thrones fans were quite willing to shell out serious bucks to see their favorite show in…