So many of the commenters here are going to be dismayed to find out that it's $0.25 per signature, but you have to deposit $10 at a time to buy nonrefundable si

So many of the commenters here are going to be dismayed to find out that it's $0.25 per signature, but you have to deposit $10 at a time to buy nonrefundable signature credits. (I'm speculating that the publisher will want to be able to accept credit cards without losing money on each transaction.)