The deltas were completely made up. If I knew they were right, I'd sign right up today. (I think.) What I don't want to do is guess at the deltas, sign up for T

The deltas were completely made up. If I knew they were right, I'd sign right up today. (I think.) What I don't want to do is guess at the deltas, sign up for Tarsnap, start up my first backup or my first incremental thereafter, and find I'm on the hook for hugely more than I originally budgeted. I think the way it actually works, what would happen is that after my first backup completes my account would go overdrawn and I would lose access to Tarsnap. And then I could walk away and all I'd actually lose would be whatever I'd prepaid. But -- and this is surely irrational, but I bet it isn't only my brain that works this way -- I would then feel really bad because (1) I would be failing to pay for something I had bought and (2) I would have spent money and got nothing in return. Even though (1) Colin surely budgets for a certain amount of attrition and (2) the sum of money involved needn't be bigger than $5. I don't want to do something that seems like it has a substantial chance of leaving me feeling simultaneously guilty and wasteful.