relying to lots of ads and older demographics low-literacy masses to sustain
FIFY
Among the "older demographics" there are the most "nerdy" people, those born when personal computers and the internet didn't exist, those growing up together with technology, used to a world when corporations didn't destroy the good of sharing knowledge.
Those are the people most likely to rebel to what reddit is doing and find their way out if it, because they know it's possible, because they've seen it before.
Youngest people are used to how the world is nowadays because it's all they've seen, but they can be shown the difference if they're willing to listen.
Low-literacy masses are those who don't listen because they don't care, people of that sort exist in every age "range" and are unfortunately the majority of content "consumers", that's why Facebook(/Instagram/WhatsApp) doesn't die, and Reddit won't either most probably.