There are many merchants who have found that increasing the generosity of their refund policy leads to decreased refund rates. I.e. a 6 month refund window may

There are many merchants who have found that increasing the generosity of their refund policy leads to decreased refund rates. I.e. a 6 month refund window may have a lower overall refund rate than a 1 month window. It gives users who are on the fence about the value of a product more time to see how they've gotten value out of it. It also gives people longer to forget to ask for the refund. The only reason some companies have a "1 year" refund policy instead of "lifetime/anytime" is because of issues like credit card merchant processors being uncomfortable with the credit risk that creates.