My advice: send the notification. It sets the tone of your relationship between yourself and your user. You send that notification (which most companies do not) and you're sending the message that you want to engage in a mutually beneficial relationship with your customers rather than just make a quick dollar.
Yes, you'll make less this way in the short term. Automatically charging but offering a refund if someone is upset will convert more, and automatically charging with no refunds will convert more than that.
But I suspect that if you look five years down the line, setting a good tone between yourself and your users will pay the most. Those who decide not to subscribe immediately are still potential future customers, and know other potential future customers.
Yes, you'll make less this way in the short term. Automatically charging but offering a refund if someone is upset will convert more, and automatically charging with no refunds will convert more than that.
But I suspect that if you look five years down the line, setting a good tone between yourself and your users will pay the most. Those who decide not to subscribe immediately are still potential future customers, and know other potential future customers.