CPC Arrives in ChatGPT, Google Bets the Stack on Agents, and Meta's Crossover Week

Send us Fan MailOpenAI has quietly flipped ChatGPT's ad model from CPM to CPC, with bids reported at $3–$5 per click after CPM rates collapsed from roughly $60 to as low as $25 in ten weeks. Google used Cloud Next to rename Vertex AI the Gemini Enterprise Agent Platform, fold in Agentspace, and commit a $750m partner fund. Meta reports Q1 on 29 April, with eMarketer forecasting it will overtake Google in global digital ad revenue for the first time in 2026. And Shopify's Agentic Storefronts have quietly plugged millions of merchants into ChatGPT, Copilot and Google AI Mode — reshaping where product discovery happens.We unpack what is confirmed, what is still hype, and what a sharp operator should actually do this week: where to test, where to hold, and how to brief a client on Monday.