Rules
The first successful purchase starts one calendar month in UTC, preserving the time of day and clamping to the destination month’s last day. Later purchases never reset the timer. Only verified PayPal COMPLETED payments strictly before the cutoff are eligible; a payment at the exact cutoff is excluded. Purchases close at the cutoff. The last eligible purchase wins, followed by 14 days of winner display measured from the cutoff. A 15-minute verification phase after cutoff falls within those 14 days. Unresolved evidence leaves the holder provisional for review.