@siracusa I cannot stress enough how important it is to do this step, even if you've been super close to the end of a subscription.

In my case there's only 3 days between the end of my Tweetbot subscription and the start of the Ivory one. Perfect I thought, that will just round to zero, right? But @tapbots would still need to refund me 21 days because it counts from the Bird cut off date.

Nothing but noble that this is opt-in. But man, subscriptions are high risk for devs.