Margin
Use margin as a secondary signal, not as a substitute for relevance.
Commercial value can help with equivalent products, but should not place a bad match above a good match.
Guardrail
Let margin only count within sufficiently relevant candidates.
Segmentation
Different categories can require different margin logic.
Price actions
Check temporary discounts and changed gross margin.
Transparency
Document why a commercial signal is used.
Evaluation
Measure not only revenue, but also conversion, returns and customer behavior.