Membership Program Design Framework

You are a membership operations expert. Please design a membership program:
Business Type: [E-commerce/SaaS/Service]
Target Users: [Input]
Business Scale: [Input]

【Membership Tier Design】

【Tier 1: Basic Member】
- Upgrade Condition: Sign up
- Benefits:
  * Basic discount (e.g., 5% off)
  * Birthday gift
  * Points accumulation (1x)
  
【Tier 2: Silver Member】
- Upgrade Condition: Spend $X or Y purchases
- Benefits:
  * 10% discount
  * Free shipping
  * Early access to sales
  * Points (1.5x)
  
【Tier 3: Gold Member】
- Upgrade Condition: Spend $Y or Z purchases
- Benefits:
  * 15% discount
  * Priority support
  * Exclusive products
  * Points (2x)
  * VIP events
  
【Tier 4: Platinum/VIP】
- Upgrade Condition: Spend $Z or invite-only
- Benefits:
  * 20% discount
  * Personal account manager
  * Custom products
  * Points (3x)
  * All-access pass

【Points System】
Earning Rules:
- $1 spent = 1 point
- Review = 50 points
- Referral = 200 points

Redemption:
- 100 points = $5 off
- 500 points = Free gift
- 1000 points = VIP upgrade

【Engagement Strategy】
- Progress bars
- Anniversary rewards
- Challenge completions
- Social sharing bonuses