From the past few days, I've identified 101 different IP addresses that downloaded the same file in the same way 169 times. The IPs I checked are owned by Microsoft. Maybe a proxy server or VPN? Either way, I'll DROP their connections now. I expect to add more IPs to the list later. I don't like the way someone burns through 50 GB bandwidth per day.
Well, it got worse:

What's wrong with people?

The same 1 GB file got downloaded approximately 200 times in an hour, this time using Google servers. And since incoming bandwidth is free, they can just burn through my bandwidth with virtually no cost. But why? Just spam my feedback like normal people if you don't like me

I've increased the IP-bans, I now DROP entire IP ranges.
This still applies:
Although unlikely: If I added your IP by mistake: please PM me.
If you don't want me to know which forum account belongs to which IP: setup a throw away email to contact me:
LoyceVswitzerland@protonmail.com