RMS was enough of a genius to understand the potential of open source software, and basically gave us, with GPL and his evangelism (and his code! plenty of it), and the free software movement, the software world we are living now. AGPL reflects the fact that he understood before everybody else that something was happening with software as a service.
I love the BSD license, but now who says that AGPL is a cancer is making a big favor to the few huge companies that want to abuse the original dream that spawned modern and open software. Times changes, the best license to use change with times.
RMS was not convinced that the Affero clause was a good idea as a general rule, though he approved the Affero-sponsored fork of the GPL that created AGPLv1. Hence, he did not support the addition of network copyleft obligations in GPLv3 during its drafting.
RMS has long expressed concerns about "Service as a Software Substitute" [1], and I think he hesitated to endorse the AGPL because it would conflict with his philosophy on the dangers of "Service as a Software Substitute".
Henry Poole should be given credit for raising the concern; Bradley M. Kuhn and Eben Moglen should be given the credit for advancing the license to address the concern.
It took a long time for the Free Software Foundation to accept Affero versions of the GPL under their stewardship with the release of AGPLv3.
So, perhaps he did understand before many people that services posed some challenges for his social movement. But it's my belief that he favored self-reliance and maximum "freedom" by running computer programs on hardware you own yourself as the remedy, rather than extending copyleft obligations to reach over the network.
Without AGPL, you still get SaaSS, but it's GPL so you don't get any source code. The GPL should have had the Affero provision to meet Stallman's wants. Otherwise companies would obviously just work around the license by using SaaSS.
I love the BSD license, but now who says that AGPL is a cancer is making a big favor to the few huge companies that want to abuse the original dream that spawned modern and open software. Times changes, the best license to use change with times.