Subscriptions: Reserved stock for exiting subscribers

[michnhokn]

Our pain point at the moment is that we have a limited amount of stock for a month.
Say we have 4000 of stock and potentially 3000 customers who are getting a product in a month. There would be 1000 products available for new customers to subscribe. So basically we have two stock counter.
One for subscribers and one for new subscribers.
If an existing subscriber cancels his "stock" should become available to the new subscriber stock.

This way we can prevent giving all stock out in the beginning of the month and a subscriber who should get his product by the end of the month doesn't get his product because there is no stock left.

Currently this is not possible and you would asume there is always stock for a product.

I know this is a special request but I can imagine we are not the only ones who are in need for such a feature :)
We basically have an Idea on how to do this so if you need more information just get in touch.

Thank you for your nice work!