Buy any add-on pack size, from the pricing page or your dashboard
The pricing page listed three sizes for each add-on pack but only ever linked to the cheapest one, so the 5- and 10-deck packs and the 100,000- and 250,000-page packs were priced in public and could not actually be bought. Every tier is now its own row with its own checkout link. Your billing settings gained an add-on section too — previously the only pack link there was a single deck, and it was shown to free accounts only, so a Pro subscriber could not buy more decks from the dashboard at all.
Refund messages got more specific at the same time. Every refusal used to read "the 14-day window has passed, or the credits were used" — a guess offered to someone who already knows which it is, and for several cases both halves were simply wrong. Each reason now has its own sentence, including a new one for a purchase whose credits have not reached your balance yet, which previously said you had already used them.
And a promo code entered while the discount service was unreachable used to be reported as an invalid code — a claim about your code rather than about our lookup. The checkout now tells you the check itself failed.