Help still documents banked resets for some promo/referral offers (refresh 5h+weekly windows; expire). Referral terms also allow usage credits or a rate-limit reset depending on the live offer. Astra launch banked resets (Sep 3–4) and the Sep 7 auto reset were one-time. Ongoing extension is usually buyable credits in Settings → Usage.
How to claim Use banked reset in Settings→Usage if shown; referral reward follows live offer
