The price of the product probably matters a lot. e.g. I don't plan on prorating monthly subscription cancellations but this won't result in any severe amount o

The price of the product probably matters a lot. e.g. I don't plan on prorating monthly subscription cancellations but this won't result in any severe amount of money gone if someone tried to abuse unless there was some giant, coordinated scam. In the latter case, whoever's credit card got stolen would likely do a chargeback anyhow.