Packs allow you to set expiration dates. This can help create a sense of urgency to use the credits before they're lost. A common duration setting for a pack might be 6 months, 1 year, or even infinite.
Terminology to be familiar with:
In the duration settings you'll find toggles for:
Activate on First Use: a setting that waits to start the expiration clock until the customer uses their first credit from the pack
Purchasable only once: ensures it can't be bought again by the same customer
Purchasable only as first pack: ensures the customer purchasing this pack has not purchased any other packs in the past
