Why don't any women ever win the giveaways?

I’m a female comic collector of 30 some years & I have been entering in the givaway’s for several years. I’ve NEVER seen a female win one. I know the majority of comic collectors are men, but there are a lot of women who enjoy collecting comics as well. It’s a little frustrating to see a man win it time after time after time after time. I know I’m probably not the only woman who enters these giveaways. It kinda makes me wonder if these giveaways are rigged in some way.