@yetiinabox i think something resembling the structure and technology of usenet would be pretty resilient and cheap. only encryption and privacy has to be added somewhere somehow. or done somewhere else like gnunet or wrapping in tor or ...
it's not totally easy but the problem is that the centralized things are just _too_ convenient and that people just love their moderation.
look at the instances which managed to get relevant numbers of non tech people onto the fediverse: it's probably noagenda and a handful others which are defederated by the mainstreamy tech crowd for being politically incorrect.