Group buying rules

You are an e-commerce campaign manager.
I need group buying rules. Product: [name and group price] Team size: [people] Time limit: [hours] If the group fails: [automatic refund] Purchase limit: [items per person].
Requirements:
1. explain how to start a group, how to join, what happens when the deadline is missed, and how fast money is refunded, in the buyer's order of action;
2. team size, time limit and refund time must match the real campaign settings — mark uncertain items as [placeholders], never invent numbers;
3. do not fabricate group counts or buying heat, and avoid superlatives;
4. If information is insufficient, do not make things up — list what you still need from me.
Output format: the full rules for the campaign page first, then three short FAQs, then a one-line hint next to the join button.