Referral Rewards Terms: earlier versions

The current version is at /referral-terms.html. Earlier versions are kept here unchanged (Terms §20.8).

• referral-1.5 (published October 9, 2026; replaced by referral-1.6 before its October 12, 2026 effective date)
• referral-1.4-draft (draft, never in effect)
• referral-1.3-draft (draft, never in effect)
• referral-1.2-draft (draft, never in effect)
• referral-1.1-draft (draft, never in effect)
• referral-1.0-draft (draft, never in effect)