Wow. Just wow. Just goes to show how much immersion meant to e̶v̶e̶r̶y̶o̶n̶e̶ some people.
Someone that knows about website building should make something like immersion and expand upon it. Make something dedicated to community-based translations and corrections for foreign language learners. Lang-8 will leave a hole in the market when it finally shuts down, as it seems the owner is abandoning it for a more profitable product.
Lang-8 is not shutting down, they temporarily closed registration in order to redirect people toward their new platform HiNative, it's just a marketing strategy, that's all.