No, this button will add a new page to list all the purchases made by other members, like here on IPS:
(I removed the member names).
That's a fast way to you get aware of those who purchased your file. You can also add manual purchases which will not create an invoice, so you will give access to paid files to people without pay for it (that's optional, via setting).
The method to purchase a file is the same; nothing changes.