Is it possible to sign up for a premium life time subscription for Drafts?
Drafts pricing information is available on the Drafts Pro page at GetDrafts.com. No lifetime subscription options are listed on that page (or in the in-app purchase options).
The existing subscription is through Apple’s in-app purchasing of subscriptions, so the potetnial options for that are provided/determined by Apple. Lifetime subscription is effectively a souped up version of a one time purchase, the latter being what Greg has moved from. Whilst it might be possible to do it with a coupon code style system (across app versions), or some other approach, there’s probably an additional management overhead for that (outside of Apple’s app subscription/purchasing), and there’s certainly nothing like that offered for Drafts at the moment.