In a text sent to his brother, Musk wrote, "I have an idea for a blockchain social media system that does both payments and short text messages/links like twitter. You have to pay a tiny amount to register your message on the chain, which will cut out the vast majority of spam and bots. There is no throat to choke, so free speech is guaranteed." In another message, to the president of his Boring Company, Musk narrowed in on an amount: 0.1 Doge per tweet or retweet. At today's prices, at 0.1 Doge per tweet, 1¢ would buy you about 160 tweets.
Musk's idea that there is some magical amount of money that ordinary people are willing to pay to send out a tweet or a retweet, but that spammers are not willing to pay to spam, seems preposterous. And given that "free speech is guaranteed" and blockchains are immutable, he would really need to hope that he finds this amount, because otherwise there's going to be a lot of spam permanently stored on Web3 Twitter.
As with many of Musk's ideas, the idea for a blockchain-based "free speech" social network is not new. On one of the more popular such services, BitClout, the home page shows posts such as "are there actually real ppl here, or only 'marketing' and ai-generated art?" It costs $0.01 to create a profile or to begin a tutorial on how to use the site. Out of the list of ten top-ranked creators on the site, the top two (Elon Musk and Naval Ravikant) haven't even signed up yet, and another five haven't posted in months.
Musk appeared to later toss out his blockchain social network idea, though not for spam reasons: "Blockchain twitter isn't possible, as the bandwidth and latency requirements cannot be supported by a peer to peer network, unless those 'peers' are absolutely gigantic, thus defeating the purpose of a decentralised network".