Earlier quoted context omitted.
No. It's not a requirement on users anymore than the GPL requiring you to distribute corresponding source on CDs was a requirement on users. Morally and legally, the distribution medium does not make a difference. When you make the software available over the network you are no longer the user -- the users of the software over the network are the users. When you convey the software over the network you are a network…
You seem to have trouble understanding the difference between network usage and distribution . If I give you a CD with nginx, I'm distributing it. If I send you a .tar.gz with nginx, I'm distributing it. If I bring up nginx on a server, put some HTML files in the webroot, and give you a URL to it, I am not distributing nginx. I am merely using nginx, and offering you a service using nginx. I am not offering nginx its…
People add links to the source code because it's much less work than responding to emails. It's entirely voluntary. Users have a right to the source code of AGPL software you make accessible to them and you can satisfy that constraint any way you see fit.