Key points
- Alphabet stock dropped roughly 13% on Thursday after the Q3 report, which paired slower Search revenue growth with large AI investment.
- Q3 capital spending reached $51.36 billion, and free cash flow came in negative at $9.07 billion.
- Google combines AI Mode results with regular campaign and search terms reports, so advertisers cannot isolate its cost, conversion or lead quality.
Why it matters for marketers: Advertisers are paying for AI Mode placements they cannot measure on their own, so budget decisions there rest on Google's claims until separate reporting exists.
Alphabet's stock fell about 13% on Thursday following its Q3 earnings. Search revenue grew more slowly while the company kept spending heavily on AI, including $51.36 billion in capital expenditures and negative free cash flow of $9.07 billion.
Some marketers read the numbers as Google shifting the cost of its AI transition onto advertisers. Max Anderson argued that Google sustains revenue by charging more for weaker traffic, citing broader keyword matching, auction pricing and campaigns that overspend daily budgets. Daniel Koss likened it to traditional media raising prices as demand fades.
Search Engine Journal notes that the earnings figures do not show Google changed its auction or budget rules to fund AI. Some of the practices critics describe are part of published policy. Daily budgets are averages, and campaigns can spend up to twice that amount on a single day within monthly limits. Ad Rank thresholds can also push click prices up without a competing ad below yours.
The practical gap is measurement. Google has pointed to AI Mode ad click rates that match those of organic product listings, but that says nothing about how those visitors convert. Because AI Mode data is blended into standard reporting, teams cannot compare its acquisition cost or lead quality with other Search traffic.
Marketers should watch whether Google adds separate AI Mode reporting, and meanwhile review search terms, lead quality and conversion windows closely, since exploratory conversations may take longer to turn into sales.
Sources
This brief is our own summary. Read the full reporting at the source.
