The biggest difference between us and Skype is that Quiet is open source. But yes, open source businesses can rugpull too, as we saw recently with Terraform.
What about our stack makes you worried about the "enough tech savvy people to fork" piece? One decision we've made deliberately is to build on the most widely-used tech, so that maintenance will require less expertise than for a homegrown stack, and so there will be existing communities around the stack that are bigger than the Quiet community. I would love to know more about what problem you envision in building a tech-savvy open source community around our stack. Too boring?
If our business is upselling users to server-backed subscription plans, I think even the threat of a fork goes a long way to keeping us honest, especially since a community fork would not need to run infrastructure. If "Quiet Co." (or whatever we call ourselves) is suddenly no longer the most trusted purveyor of Quiet, we wouldn't have much of a business, which is as it should be in my view.
Re: the politics of providing these tools, I have been preparing, and I have some background in the political side of this from Fight for the Future. It's funny because I am actually quite eager to get to the point where we get to make the social and political case for Quiet to a partly-skeptical world, but first I have to make something that works well on phones! And find users! Ideally we can find some awesome initial users that really tell the story of why Quiet needs to exist.