Not much more than the title. My niche (privacy/utility/developer tools) is pretty averse to subscriptions, and I got that feedback directly from customers. my annual rate is $9.99/yr, so I made the lifetime $24.99/yr. Just 4 sales doubles my lifetime revenue on the first day! I was a little nervous about adding it but lifetime users are my most important users, and my most engaged, so they will help make the app better with more feedback and support requests submitted by /...