> Amazon do basically the same thing with their prime membership, although they do refund if you notice and complain early enough (offer a free month and then start charging unless you opt out, whilst making it far from obvious that you have to do so).
No, its quite obvious that you need to opt out if you don't want to pay -- they explicitly say the membership will be billed to the credit card attached to your account at the end of the free period, and force you to attach a credit card to your account if you don't have one already attached in order to sign up for the free Prime trial -- when you sign up, though its also easy to forget afterwards. But they give you a complete refund anytime in the paid period if you ask, as long as you haven't used any Prime-exclusive benefits during the paid period.
And its a zero-friction, click-a-button, cancel-and-get-refund thing.
