I would offer a cancellation policy within 30 days. The way I see it, there are only two reasons why anyone would get payment information up front. A: To 'tric

I would offer a cancellation policy within 30 days. The way I see it, there are only two reasons why anyone would get payment information up front. A: To 'trick' people into paying for something they might have decided against buying. (Bad reason) B: To limit people who try to take advantage of unlimited free trials - buy using credit card info as an identifier, you could tell who's already had a free trial and who hasn't (to some extent). If it's for reason A, don't do it. If it's for reason B, do it, but don't charge them until they confirm at the end of 30 days. Send them an email with something like, "We hope you enjoyed your free trial. If you are happy with the service and would like to continue using it, click here and get a promotional 10% off your next 3 months." Anything to ease your customers over the second hurdle of committing to using the service will be good.