C1 (a credit-card issuer) is considering partnerships with a home‑sharing platform (Rent‑a‑Home, RH) and big-box retailers (Costco‑like) to attract high‑LTV cardholders. Define “high value” quantitatively (e.g., 12‑month net contribution after CAC and expected loss, or 24‑month CLV). List and justify the top factors you would analyze before signing: overlap and incremental reach, expected average spend and category mix, interchange by MCC, partner commission/revenue share, promo mechanics (e.g., 30% off RH), cannibalization of existing spend, breakage, approval/activation/usage funnels, credit risk and expected loss, fraud risk, operational/servicing costs, and legal/regulatory constraints. Propose a measurement plan: primary KPI(s), guardrails, experiment design (randomized offer with holdout), sample size and power assumptions, and how you’d detect/adverse‑select against “credit‑card gamers.” Specify data needed, key segments (new vs. existing, peak vs. off‑peak), and your go/no‑go thresholds (e.g., payback within 12 months and minimum IRR).