You only have to go back to the first home computers in the late 80s and the first games and the fact that women in general were smply not curious nor excited by the advent... first multiplayer online rpg Ultima Online around 1995, the presence of real women or girls ingame being extremely rare... rather, the stocking of female characters by boys and men who openly wished that their wives/girlfriends would come on board... also, fps games like Quake in the late 1990s with similar situation. Real women who were genuine and succeeded at these things were, in fact, respected.
 
Then came the realisation that this nerd, techy, internet thing was a massive money maker and the previously free web was commercialised and corrupted beyond repair it seems. Women who realised their missed opportunity for a decade started getting into the business... because that's all it is right now.. a business with a bottom line and the Melissa Meyers of this world. 

I completely agree with the Manifesto.