Bracha Shapira

Promotional campaigns are essential drivers of customer engagement and revenue in e-commerce. Maintaining these campaigns within budget constraints requires targeted allocation, traditionally achieved through causal uplift models that rely on vast datasets of user interactions, including non-converted sessions, which introduce challenges such as noisy data, attribution complexity and imbalanced outcomes. We propose a novel approach using converted-only data, which reduces training data size, simplifies attribution, improves efficiency, and mitigates the impact of non-converted interactions. We present a generalized framework for budget constrained promotion allocation with converted-only data and validate it through a benchmarking study and multiple large-scale deployments at Booking.com, positively impacting the experience of millions of customers worldwide. Our results demonstrate that the proposed method is competitive with standard modeling approaches and, in some cases, significantly outperforms them.