I have been using the add on for a while and it has been working fine. I have set a limit of 2 PDF files/week per user ID, but looking at the Free Downloads Logs page I saw that a user was able to download 20 files last Sunday (07/12/2020). Today, I tested the functionality and it seems to be working, since I was not able to download more than allowed by the rule.
I took a look at Error Logs & Debug and it shows no errors.
Is it possible for a user to trick the download limits rule? Any thoughts on that?