[thechao]

I think unlimited recurring subscriptions should just not be allowed, period: all multipay plans should have a fixed & finite pay period, after which the service expires. Only the card holder has the unilateral right to re-establish the payments.

[mLuby]

What if the user wants to cancel before the term is up? If that's allowed, there won't be discounts for annual plans. (Maybe not a bad thing, but maybe inefficient.)