You seem to have the business model backwards. People who post there are contributing their time and knowledge. They're giving you something. There's no reason for them to pay you. That's why web 2.0 can't be replicated on blockchains and no one has ever created a successful mainstream blockchain-based web 2.0 product.
In an age where platforms pay you for your content, such as Substack, I can't see how charging someone $0.01/post to write in a Reddit-like platform will have any success.
Regarding speed and scale - 4 seconds is an eternity in the modern web. IPFS won't work because it's too slow and again, too expensive.
