Adobe.

"Currently, you cannot stop your plan from renewing automatically. To turn off automatic renewal, you will need to cancel your membership."

You have 14 days to cancel for free at initial purchase. But when they autorenew, even at a new, high price, an early termination fee applies immediately. Hundreds of dollars if your plan was annual.

Get a human on the phone, demand to cancel, whine, and they'll give you a decent deal.

To end the abuse, set a reminder to cancel in the last month.