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# Virgin Voyages, PebblePost tie ad spend to incrementality testing
- URL: https://www.medianexis.com/virgin-voyages-pebblepost-tie-ad-spend-to-incrementality-testing/
- Published: 2026-10-13T00:21:07.000Z
- Updated: 2026-10-13T00:21:07.000Z
- Description: Adweek’s Ashley Cisneros Mejia reports that Virgin Voyages and PebblePost use holdout groups and verified purchase data to test incrementality, with PebblePost once advising Virgin to hold back budget rather than spend it on declining efficiency.
- Author: The Signals Desk
- Tags: Measurement, Ashley Cisneros Mejia, Adweek panel on trust and incrementality in media

**Why it matters.** Marketers gain leverage to defend budget cuts internally when a vendor’s own data recommends restraint over spend.

*Signal from* [*adweek.com*](https://adweek.com/?ref=medianexis.com) *·* [*Ashley Cisneros Mejia*](https://www.medianexis.com/tag/by-ashley-cisneros-mejia/) *·* [*read the original*](https://www.adweek.com/performance-marketing/trust-and-incrementality-help-brands-scale-bigger-ideas/?ref=medianexis.com)*.*