medianexis.
Reporting index

Seb Joseph

Covers ad-tech and creators. Bylines at digiday.com. Desk record: 11 signals cited since August 2026, 10 published. Updated September 18, 2026.

Indexed from published reporting. Not a medianexis staff byline. Any journalist can ask to be removed.

Coverage

10 stories, newest first.RSS →
Measurement brands-scramble-for-ai-visibility-as-no-standard-measurement-exists

Brands scramble for AI visibility as no standard measurement exists

Marketers now fight over whether AI chatbots mention them at all, not how they rank, but citation patterns vary wildly by platform.

Sep 15
Ad-tech amazon-gives-advertisers-access-to-chatgpt-ads-via-openai-partnership

Amazon gives advertisers access to ChatGPT ads via OpenAI partnership

Amazon and OpenAI struck a partnership letting advertisers using Amazon’s ad tech buy placements inside ChatGPT. It extends Amazon’s ad business beyond its own retail and streaming properties into a major generative AI chat surface.

Sep 14
Creators brands-start-briefing-creators-to-win-over-ai-chatbots-not-just-audiences

Brands start briefing creators to win over AI chatbots, not just audiences

Marketers now weigh two things when spending on creators: whether they move human audiences and whether they move algorithms inside AI platforms. That second factor hasn’t hit pricing yet, but it is already shaping creator briefs.

Sep 5
Retail-media wtf-is-the-amazon-ad-surcharge-lawsuit

WTF is the Amazon ad surcharge lawsuit?

The FTC and 22 state attorneys general allege Amazon secretly abandoned its second-price search ad auction, inserting a fake “soft reserved” bidder to push prices higher.

Sep 1
Ad-tech openais-chatgpt-ads-hit-1-billion-run-rate-opens-eu-self-serve

OpenAI’s ChatGPT ads hit $1 billion run rate, opens EU self-serve

OpenAI’s ad business is now annualizing at $1 billion in revenue less than 200 days after launch.

Sep 1
Ad-tech trade-desks-zuma-update-trades-disruption-for-polish-after-kokai-backlash

Trade Desk’s Zuma update trades disruption for polish after Kokai backlash

The Trade Desk’s Zuma release adds UX fixes, faster lift studies and a Koa AI assistant to Kokai, plus the option to route agents through outside tools like Claude rather than forcing everything into its own interface.

Aug 30
Agencies wpps-legal-woes-mount-but-clients-arent-fleeing-yet

WPP’s legal woes mount, but clients aren’t fleeing yet

WPP faces a former exec’s kickback lawsuit, a class action alleging execs misled shareholders for 19 months, and a Sony probe finding WPP kept 80% of publisher rebates. Clients like Coca-Cola still praise the holdco publicly.

Aug 24
Agencies court-filings-wpp-insiders-say-groupm-simplification-was-quietly-abandoned

Court filings: WPP insiders say GroupM ‘simplification’ was quietly abandoned

Exhibits in a wrongful-termination suit quote ex-WPP executives saying GroupM’s restructuring stalled by 2024, with cuts outpacing fixes. One called Choreograph’s data five years behind Publicis’s Epsilon.

Aug 19
Ad-tech ad-techs-public-market-exodus-four-delistings-in-a-year

Ad tech’s public-market exodus: four delistings in a year

Nielsen-DoubleVerify, IAS-Novacap, LiveRamp-Publicis and now Criteo-Vista mark four take-privates in a year, while public survivors like Trade Desk get punished despite growth.

Aug 14