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We present a model of duopoly competition in a marketplace with a llotelling segment of consumer& where two business users (firms) have access to raw consumer data. The firms can chase between personalized prim (PP). using a costly personalized program device provided by the marketplace. or tunform prices at no additional cost. One firm has a higher level of experience in utilizing consumer data. insulting in a lower cost of price personalization (PP device cost). In order to promote its personalized program device, the marketplace may have an incentive to distort consumer preferences from a uniform to a triangular distribution. Our findings indicate that the marketplace is more likely to distort consumer preferences under specific conditions. This occurs when there is moderate asymmetry in experience between the rums and a high tariff for the program. or when there is weak asymmetry and a moderate program tariff. In these parameter regions, the distortion of COD/411111er preferences negatively impact the profits of the sellers while benefiting the consumers. nose insights contribute to a better understanding of the dynamics of digital marketplaces and have implications for policymakers and competition authorities., This research has been financed by Portuguese public funds, through Norte 2020, FEDER and FCT(projects reference NORTE-01-0145-FEDER-028540 and FCT2022.03862.PTDC).