I'm genuinely concerned by some, or a lot, of these responses. Reddit has done nothing wrong. Was it the right thing to do? Clearly not, but 100% within their rights to do so and or worse if they so chose. It's their platform. They owe not a single user, or any app which used their platform anything, never have.
I recall, shouldn't Twitter have died by now? That Mastodon exodus sure has gone to a trickle.
They cannot, even if they wanted to, give in here or that opens up a whole new set of problems.