The New York Times successfully uses the Roach Motel pattern by making the subscription process very easy but the cancellation process much more complicated.
On the promotion page, they claim, "No commitment required. Cancel anytime," but underneath this title, there is a link that leads you to the "Terms of sale" policy that explains to you how to cancel the subscription.
The policy says next: "You can change or cancel your digital subscription at any time by calling Customer Care." This is a classic Roach Motel dark pattern. You subscribe easily, but the cancellation process is much more complicated. They make you call and wait for a customer representative to help you with cancellation.
If your company provides an online subscription process, you must provide the same process to cancel it. Do not try to increase your retention numbers just by making the opt-out complicated. It works only for a short distance.