I think in the near future there will be growing political discussions on how we as a society deal with social media platforms in terms of free speech and the rules of censorship around it. At the moment it's a bit of a free-for-all, with each platform doing its own thing and making up its own rules as they go along. Print and conventional media codes of conduct don't seem to apply. Legislation and legal cases will be needed to bring tech giants and social media platforms to play by the same rulebook and have a base level of consistency in what's allowed and what isn't.
This needs mainstream media attention so the general public is aware of what's going on - they need to be informed of the sort of vile posts and groups that stay up in places like Reddit and Twitter. How rape and pedophilia and other disgusting stuff is allowed, yet women discussing and criticising these practices or other types of ideologies are being shut down. Parents need to be aware of what these platforms are and discuss with their children about using them. I think Reddit is quite popular with a younger demographic? When politicians start being asked difficult questions by the public as to why these cesspits are allowed and their children are able to freely access them, then there will be some uncomfortable squirming.
Anyway, these are just platforms. You can't shut down the internet. Women are resourceful and talented. There's no reason why alternatives can't be developed and used. I think that's what Spinster and Parler are for. It's a shame that people will end up in silos or echo chambers, but it will have to do for now.
If women are serious about winning these sort of arguments, then I think the free speech angle is a better approach. GC subs were targeted, but also other types that don't conform to certain political viewpoints. These platforms are drawing up rules and making decisions along political lines or whatever is in fashion which will turn out to be what contributes to their eventual decline.
If a rival was established that genuinely promoted free speech and applied rules and bans impartially and consistently, then it would see significant membership growth and revenue.