I'm a little loopy so apologies for overthinking and talking too much.
While the identification scheme sounds like it would work, I'm not sure how well lay-women will be able to use, keep, and secure their tokens (and/or are you going to save them as cookies or session data?). Also consider the "lost password/api key" outcome, which will possibly require additional id verifications to resolve if you aren't keeping emails for users. If you're confident monetization will work that doesn't have to be a problem, or could be shifted onto the user, but that is one more assumption or problem. If there ever was a breach that compromised all of the api keys, would there be a way forward that doesn't involve having all users re-verify their identities? I understand the goal of a female space/area, but are there other ways it could be achieved?
My big picture thoughts are that you already have a flourishing female community here on the farms, and this may wind up being so much work that you eventually fail to follow through since you have so much bullshit to deal with. If you want things to be more anonymous, or have more secured/segregated areas, that sounds like a great idea to try out here. I'm not sure what the ID requirement would add for the users. Perhaps if there was a super sekrit area that required verification then users you are able to attract more easily would engage with it, but it's a bit much of an ask just to dip your toes in the water, particularly for the less technically in-the-know. Since you've acknowledged that some trannies will get through anyways and will have to be jannied, does ID verification provide enough value to justify the cost compared to something like email or phone number verification? You could still provide API keys that way if you were so inclined. Ultimately, community moderation will be needed regardless.
I've run into a real problem: these identity services like Plaid and Stripe do not actually provide the gender field. They seem to deliberately omit that. They'll tell you everything else.
That's a bit of a wrench thrown into the works, surely there has to be one service that gives that to you? Maybe you could lean into a system of self identification and reprisal for being where you don't belong and disturbing the peace?
I'm also considering a simple segregation.
Does this include a general area that all app users can access? If so, I would consider a simple verification (email/phone number generated api key) with the ability to use the third party id verification services to associate more specific demographic information with the simple key - you could even associate a simple key with a verified key to avoid tying PII to any form of contact visible via breach. This would avoid having to reverify in case of a lost key, avoid having an upfront cost for new users, let you deal breaches more simply, and still allows you to track bad actors (banned accounts could taint the simple key and/or the verified key as appropriate).
Monetization would be through average routes and also play store. It's not an offensive app and I have an idea of how to market it safely which I won't discuss.
I would love to see you release a simple app that is financially successful, but it's possible you're getting cocky and have forgotten that you are the nigger of the world, and companies will go out of their way to break their own terms of service and also the law to fuck with you for little to no reason or consequence. I'm also not sure how well you will be able to effectively distance this new app from KF, which leads back to me wanting to see some of these ideas tried out here. The new app will be heavily impacted by the reputation of your site and you, due to your orbiting a-logs if nothing else. If you aren't investing a whole lot of time and effort into getting it off the ground then maybe that's just part of the risk, but past a certain point I think that would hurt.
It's not an offensive app
A lot of people, corporations, and governments find transphobia pretty offensive, even though I agree it's a reasonable idea.
Anyways, good luck, sneed, TTD etc