While e-Sports are often gender-divided (competitive StarCraft is notable in this regard), the idea of a men-only Hearthstone tournament was apparently the straw that broke the camel's back. Among many others, Blizzard spoke out against IeSF policy, telling VentureBeat, "One of our goals with e-sports is to ensure that there's a vibrant and also inclusive community around our games. We do not allow the use of our games in tournaments that do not support this, and are working with our partners to ensure they share the same goal."
The end result is that the IeSF has reversed the policy, and offers events open to all genders as well as women-only events to encourage the participation of women in the male-dominated field of pro gaming. It's a setup that's similar to the competitive chess scene, which has both a World Chess Championship in which anyone can compete and a Women's World Chess Championship. Now, at the 6th e-Sports World Championship BAKU 2014, men and women will be able to compete together in StarCraft 2 and Hearthstone tournaments, while there's also a women's only StarCraft 2 tournament. Time to get your game on!