That said, "Twitter/Reddit but every post is a voicemail" is a dream I wake up from in a cold sweat. It is a thinly-veiled threat. If you were trying to keep a cool website from me, and you accidentally said the name and I asked "what's that," if you said "oh, it's twitter/reddit but every post is a voicemail" you would successfully hide it from me. I cannot imagine a concept less compatible with the way I desire to experience the internet.
I'm happy for you, glad you built a cool thing, and I'm hopeful you see all the success you want from it. I shan't be going there.