Guten Tag! A few things to mention here.
You can change the flavor OR the frequency at any time. Go under your subscriptions to change this. It will guide you to the same subscription page again. While you create the NEW subscription, it deletes the OLD subscription.
You accumulate points for every purchase on this website. The way to redeem is, to check your points and get yourself something for free. You have to have enough points to redeem the item you want for free and it can’t be included in another order or applied to regular order. We are working on a system that allows you to do other things with points…coming later this year!