DeathWorm, yes, there are a lot of other things besides the low-level plumbing on the one hand, and the end-users on the other.
Internet regulation is, as far as I have seen in the Western world, gender-neutral. I'm not sure what you mean by "platforms", though - for me, a web platform is a content management system sitting on top of a webserver on top of an OS, a collection of entities that I'd see as gender-neutral.
Ownership of the plumbing is (in the West) mainly big private corporations who don't care about content being delivered over those pipes provided they don't take up too much bandwidth or cause significant legal issues.
Ownership of the sites is, obviously, more varied but predominantly male. But there's nothing stopping women from owning and creating their own sites therefore, at first glance, I'd call that egalitarian - at least in concept.
Business models? There's a huge variety of business models on the web; the vast majority will happily take money from anyone (eg FaceBook, eBay, Google) and will spread as wide a net as possible in an effort to get at least some revenue. Some sites are specifically aimed at men and some others are specifically aimed at women.
I must admit, having gone through this list I come back to the thought that inequalities and inequities on the Internet are primarily seen in the content and/or the users, though. I don't see anything inherent in the Internet itself (ie, the Internet minus the websites and users), or the supporting laws, business models etc, that have a significant impact on equality.
I'm really not trying to be argumentative for the sake of it here - you seem to be saying that even if you exclude the websites and the punters, the Internet as a whole is not egalitarian. How so?