Even if you implemented the whole checkout process yourself, you'd still be paying at least ~3% to your credit card processor -- more if you're handling small p

Even if you implemented the whole checkout process yourself, you'd still be paying at least ~3% to your credit card processor -- more if you're handling small payments, as most processors charge a fixed fee as well. 10% to handle the entire subscription/checkout process isn't bad at all, especially if it means that many of your customers can check out without entering any billing details.