> Tired of your monthly yoga pants subscription? Or a two-week "free" trial that lasted four months? Just deactivate that card number. It's that easy. I'm a li

> Tired of your monthly yoga pants subscription? Or a two-week "free" trial that lasted four months? Just deactivate that card number. It's that easy. I'm a little wary of this functionality. Although most responsible businesses just cancel the subscription after a declined payment, some will sic a debt collection agency on you because they claim you owe them the money. My Google-fu is failing me now, but I know I've read of this happening recently. I'm also wondering how the magnetic strip on the back works. Does that get changed with each swipe as well? That would be really nice functionality to have, though I understand the complexity of implementation.