Admux buys ad placements in ChatGPT, Google AI placements and the Gravity network from one prepaid balance. This blog is where we will write about those channels at more length than a fact page allows.
What we will write about
- Channel changes. When a provider changes its rules, formats or availability, the short version goes in the changelog. A post follows when a change needs explaining.
- How each channel works. Walkthroughs that build on the channel pages, the guides and the ad specs.
- Buying through an agent. Notes on the HTTP API and the MCP server.
How we source what we write
Every channel fact on this site links to the provider’s own documentation and carries the date someone last read it. Posts follow the same rule: they restate facts from the channel pages and link to them, so you can check the source. A few examples of what those pages record today:
- ChatGPT ads take a title of 3–50 characters and a body of up to 100 characters (ChatGPT ads, ChatGPT ad specs).
- Existing Google Search, Shopping and Performance Max campaigns are automatically eligible for ads in AI Overviews and AI Mode, with no new campaign or separate budget (Google AI Mode ads).
- Gravity matches ads to context: it compares recent conversation messages with active campaigns, runs an auction and returns the winning ad (Gravity network).
When a source changes, we update the channel page first and note the change in the changelog.
Following along
Subscribe to the blog feed or the changelog feed in any RSS reader.