Similar with (Joomla) Template Club, purchasing a bundle will give you access to all available items in the bundle collection you are purchased, in a particular duration.
The only difference is only about commitment to release a new template every month.
We probably will release new items monthly (even more) but no commitment to release new template every month.
We decide to put our focus to deliver high quality and bug free items and sometimes it needs more energy and extra time to work on it.