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# Audit: most AI assistants lack opt-out for ad data sharing
- URL: https://www.medianexis.com/audit-most-ai-assistants-lack-opt-out-for-ad-data-sharing/
- Published: 2026-11-02T15:20:47.000Z
- Updated: 2026-11-02T15:20:47.000Z
- Description: PPC Land’s Luis Rijo reports that seven academic researchers audited 788 privacy settings across 30 AI products and found only 14 of 29 applicable products let users opt out of data sale or sharing for advertising.
- Author: The Signals Desk
- Tags: Ad-tech, AI, Luis Rijo, AI products lack ad data opt-out audit

**Why it matters.** Advertisers and ad-tech vendors building on MCP or Agent2Agent cannot rely on any built-in signal for consent or opt-out, since the protocols themselves have no privacy field.

*Signal from* [*ppc.land*](https://ppc.land/?ref=medianexis.com) *·* [*Luis Rijo*](https://www.medianexis.com/tag/by-luis-rijo/) *·* [*read the original*](https://ppc.land/only-14-of-29-ai-products-let-users-stop-ad-data-sharing-audit-finds/?ref=medianexis.com)*.*