We are not Amazon affiliates, nor are any of our members who post links to Amazon products on our Discourse.
Our members sometimes post links to products on Amazon which may be of interest to our community but it won’t be that many, I would say it’s as low an average as one Amazon link per day. So we’re not really abusing the system.
I’m still not quite sure why I can wget the URL directly from the server without an issue though 
Is there anything else I could try or test? Any caches I could flush or processes I could restart which may ‘refresh’ something?