How does this module work?

[movieseals]

From the description, this module appears to do something I want:  Add a product to a customer's cart or order or on some sort of list if it meets certain conditions, say the customers want to subscribe to this title future volumes (I sell books).

However, I am confused: I installed the module and it only asks to setup a cron.  No time is mentioned (hourly, daily, weekly?).

I understand I need to create the list in the Catalog portion of the menu, but how would I go about it?

I look at the list definition and it is a bit unclear how I set up my conditions or if it would work at all.

Thanks!

C.