https://www.gnu.org/philosophy/free-software-even-more-important.html
rms himself writes (in (3)) about why the AGPL is nonfree.
@lxo yes the user of the software is the person running the software on their computer - that is, the server operator.
the anti-capitalism ideology in rms/fsf has to swap the terms around to suddenly declare these people running software on their own computers somehow unworthy of privacy.