Why restricting the numbers of sales increased profits (and gave us more downtime)

It seems illogical to sell just 25 copies of a product when the product is just digital. 

Isn't it just a PDF, audio or video? Shouldn't we sell as many as we can? On the face of it, this logic of selling less seems seriously flawed. But is it?

Find out what did we found when we started selling less instead of selling greater numbers?