Design a high-converting email sequence for a [BRAND NAME] loyalty program that maximizes member retention and repeat purchases. Outline a 5-email sequence, including: 1) A welcome email with [CUSTOMER BENEFIT] highlights, 2) A points balance reminder with [TIME-SENSITIVE OFFER], 3) A tier upgrade incentive featuring [EXCLUSIVE PERK], 4) A birthday reward email with [PERSONALIZED GIFT], and 5) A re-engagement email for inactive members using [WIN-BACK STRATEGY]. For each email, specify: subject line hooks, personalization tactics using [CUSTOMER DATA POINTS], and clear CTAs. Include psychological triggers like urgency and exclusivity while maintaining [BRAND VOICE] consistency.