FYI if you set PayPal as your payment method, you can cancel your subscription in a couple clicks. Obviously it'd be preferable to NOT have a ridiculously difficult cancellation process, but that's one way to make it easier.
I like xfce as much as the next casual Linux user, but how big a deal is it really? How impactful on the world is the not-even-first-rank Linux desktop? Is its usership even in the tens of thousands?