No, Lucky Golden Shield times do not stack.

When making a purchase, your shield time will either be set to the duration that comes with your purchase or remain unchanged, whichever of the two is longer.

Example 1
  • You have 50 days of Lucky Golden Shield
  • You make a $1 purchase that comes with 30 days of shield
  • Your shield time remains at 50 days

Example 2
  • You have 15 days of Lucky Golden Shield
  • You make a $1 purchase that comes with 30 days of shield
  • Your shield time is now 30 days