Commerce Graph · Opportunity model
Credit Cards · Premium Travel
Strata Premier converts editorial mentions into apply-links better than any card on the NerdWallet shelf — it just doesn’t have enough mentions. Buying more shelf space costs Citi an estimated $50K–$244K/year in affiliate spend, depending on target. Modeled ROI: roughly 10x.
Incremental affiliate spend to close Strata’s mention gap — paid to NerdWallet, not revenue Citi collects.
Strata’s Conversion Index — best on the shelf. This spend buys more shelf space to convert on, not better conversion.
Modeled ROI holds near 10x at mid-case assumptions across all three growth scenarios.
34 best-of/hub pages on nerdwallet.com · 2,207 apply-link CTAs audited · July 2026.
Mention share is each card’s share of mentions among these 4 premier cards (sums to 100%). Apply-link share is each card’s share of all 2,207 audited apply-link CTAs shelf-wide, which is why it doesn’t sum to 100% — this shelf-wide basis is what the Conversion Index needs to measure over- or under-performance.
5 pages directly measured via Similarweb; 29 long-tail pages estimated on a conservative range.
Holding Strata’s 0.94 apply-links-per-mention conversion rate constant, scaling only mention count.
Scenario A (parity with Amex Gold), mid-case cardholder LTV (~$1,550 over 4 years).
Annual fee + net interchange + interest income → $1,000–$2,200 lifetime value over 3–5 years.
Low end at $200 CPA, high end at $100 CPA — holds ~10x at mid-case.