usually you subscribe to a magazine say for a year - and it is per se a continous subscription which can be terminated at certain dates with a certain deadline.
the subscription of our special edition packages is limited to a certain period / number of volumes from start.
maybe we will offer something like *the new articulation of the month* to which you can subscribe like to a magazine ... i think there would be packages for a few hundred years .. such a subscription can be terminated every year one month in advance.
christian
and remember: only a CRAY can run an endless loop in just three seconds.