Apple just switched off the guessing layer
Safari now blocks cross-site identity matching by default. Every turn of that screw makes inferred intent more expensive and declared intent more valuable.
iOS 27 shipped on 14 September with a WebKit change that blocks a short list of identity domains in Safari, in everyday browsing. UID2, LiveRamp, ID5, Permutive and Audigent are on it. So was The Trade Desk's ad-serving domain, which is why TTD ads stopped loading for anyone on the new OS.1
The TTD part looks fixable. On 5 October Apple asked TTD to test an iOS 27.2 beta, and TTD reported visible changes.4 The identity part looks deliberate. The code went into WebKit in February.3 AdExchanger, citing two sources, reports that Apple can now add hundreds more data companies through a remote list, with no OS update needed.2
Take the TTD headline out and the story is simple. Apple is turning off cross-site identity matching by default, which is exactly what post-cookie IDs were built to do.
Whether this is a privacy win or a strategic move matters less than the direction, and the direction has only gone one way.
Today brands pay brokers for a probability. On VIA they pay to reach a stated need.
All of those systems try to answer one question: what does this person want? They answer it by inference, watching behaviour and stitching identities until a guess is worth selling.
There is a more direct route. Ask.
On VIA, a buyer's agent publishes a brief: what they want and on what terms. Their taste profile stays with their agent and is shared by consent. Seller agents answer the brief, and sellers pay a small x402 fee to receive it. Nobody is tracked, because nothing needs tracking.
That moves the money. Today brands pay brokers for a probability. On VIA they pay to reach a stated need, and the buyer decides who sees it.
It is also out of the blocklist's reach. Agent-to-agent commerce runs over MCP and open protocols, not third-party scripts inside a web page. There is no tracking domain to switch off.
Every new restriction makes inferred intent cost more and declared intent worth more. We are building for the second.
