The Worst Deal of the Century
· 5 min read · By Jacques Jean
Jack Dorsey sold the future of artificial intelligence for $44 billion and didn't know it.
In October 2022, Twitter's board accepted Elon Musk's offer of $54.20 per share — a 38% premium over the pre-announcement price, valuing the company at roughly $44 billion. The board called it fair from a financial perspective. Wall Street called it overpaid. Wedbush analyst Dan Ives said it would go down as one of the most overpaid tech acquisitions in M&A history, pegging fair value at $25 billion.
They were all looking at the wrong asset.
Twitter had no idea what it was sitting on. The board treated the platform like an advertising business with a user-growth problem. They valued it on revenue multiples, on engagement metrics, on monetizable daily active users. They never priced what actually mattered: a real-time, opinion-rich, behaviorally-tagged dataset of how human beings argue, react, signal, joke, lie, organize, and reason — at planetary scale, updated by the second.
That dataset is the rarest input in artificial intelligence. And Twitter sold it for the price of an ad business.
What Musk actually bought
Musk founded xAI in March 2023 — five months after the Twitter deal closed. The sequence is the tell.
By July 2024, xAI had quietly flipped a default setting: every public post on X would be used to train Grok unless the user opted out. Unlike ChatGPT or Claude, which operate as standalone services, Grok was given real-time access to all public posts on X — a data source no other major AI lab has. Reddit charges hundreds of millions for API access to its corpus. Stack Overflow licenses its data. The New York Times is in court. Musk gave himself an exclusive, perpetual, royalty-free license to the largest live opinion graph on Earth — by buying the company that owned it.
Then in March 2025, the structure became explicit. xAI merged with X in a transaction valuing xAI at $80 billion and X at $33 billion ($45 billion in enterprise value, less $12 billion in debt). The companies that had already shared data, compute, employees, and a CEO were now formally one entity. The "social network" line item disappeared. What remained was an AI lab with a 600M-user data engine attached.
Eleven months later, the long con paid off in full. SpaceX acquired xAI in an all-stock deal valuing the combined company at $1.25 trillion — the largest merger of all time, with SpaceX valued at $1 trillion and xAI alone at $250 billion.
xAI went from concept to a quarter-trillion-dollar valuation in under three years. The data moat from the Twitter purchase is the reason that math works.
The vertical stack nobody else can build
This is the part the market still hasn't priced.
Every other frontier AI lab is renting. Renting GPUs from hyperscalers. Renting power from regulated utilities. Renting training data through licensing deals that get challenged in court. The unit economics of AI in 2026 are the unit economics of a tenant.
Musk's stack is owned, end to end:
- Data: X (acquired October 2022).
- Compute: Colossus, xAI's Memphis supercomputer. It went fully operational in December 2024 after a 122-day build, and on December 30, 2025 xAI purchased a third building to expand training capacity to nearly 2 gigawatts and house at least one million GPUs.
- Energy and storage: Tesla disclosed it sold $430 million of Megapack battery storage to xAI in 2025, and separately invested $2 billion in xAI as part of its $20 billion Series E funding round.
- Critical minerals: Tesla's lithium refinery near Corpus Christi — the first spodumene-to-lithium-hydroxide facility in North America — entered full production in 2025, on a site representing more than $1 billion in investment.
- Distribution and physical AI: SpaceX (now the parent), Starlink, Tesla's vehicle and humanoid fleet, Optimus.
OpenAI does not own its compute. Anthropic does not own its energy. Google does not own a real-time global opinion graph. None of them own a lithium refinery. Musk owns all of it inside one corporate family.
What Dorsey gave up
Dorsey eventually said it out loud. In April 2023 he wrote that Musk should have walked away and paid the $1 billion breakup fee, and that the board should not have forced the sale — "it all went south." He blamed market conditions. He blamed the board. He took a quiet equity floor: Walter Isaacson's biography revealed that Musk privately promised Dorsey he would buy back his Twitter shares at the original $54.20 takeover price if Dorsey ever needed the money — making $44 billion Dorsey's valuation floor.
Dorsey got his floor. Musk got the foundation of a $250 billion AI company.
That's not a discount. That's the worst trade of the century.
The lesson
When the asset on the balance sheet is content, ads, and engagement, but the asset in reality is the training data for the next decade of intelligence, the seller will always underprice it.
Twitter sold an ad platform. Musk bought a moat.
The next time someone tells you a deal looks overpriced, ask what the buyer thinks they're actually buying.
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