The gift subscriptions that come with a Hyperglot/ Multiple Language - Lifetime subscription are available as soon as you activate your backer's portal after you receive your code. Here your gift subscription can be found and used to make an account on the same website.
When you purchase a gift subscription from the portal, the code you receive is redeemable immediately and can also be used to make an account.
Making a portal on app.fluent-forever.com will give them beta access when we're doing betas, and then their 12 months start ticking as soon as they create new flashcards in the full release of the app. (So if they don't start creating flashcards until September, then it won't start the clock until September.)