Purchased Sparks do not expire. Unused credits stay in your account and add to later purchases; they do not reset each month.
Daily included Ask answers are different: they reset each UTC day and do not roll over.
Cancelling a subscription keeps your purchased Sparks and retained Free Account. Refunding or disputing the payment that established member access can instead restrict that access; separately purchased, unrefunded Sparks remain saved while billing resolves it.
An approved Spark refund reverses the corresponding credits. Account deletion forfeits unused Sparks when deletion completes, subject to applicable consumer rights. See the refund and deletion guides before choosing either action.
Purchase availability: New purchases are briefly paused. The pricing page shows the current catalog, not an available checkout. Existing balances and billing controls remain available; the app shows which actions you can use.