HBO's New 'Bleed for the Throne' Campaign Rules
Superfans will do just about anything to gain more access to their favorite content, and "Game of Thrones" buffs were asked to prove it by literally bleeding for the 'Iron Throne' at this year's SXSW Conference & Festivals. Teaming up with the American Red Cross, HBO teased the final season of the beloved series with a blood donation campaign that underscored the sacrifices characters have made in the show while promoting a good cause. Here's our firsthand take on the immersive experience. MORE