Deploy some game theory here. Regardless of what the drafters of GNU Affero GPLv3 intended, there are really four outcomes here (with wording since edited for clarity):
Precondition: Take a GNU Affero GPv3 product, modify it, and expose it over a network, directly or by proxy, over a network, for users to use.
Your four possibilities:
(1) If you provide source, and the courts uphold the 'Remote Network Interaction' clause: you're fine.
(2) If you don't provide source, and the courts uphold the 'Remote Network Interaction' clause: you're screwed.
(3) If you provide source, and the courts don't uphold the 'Remote Network Interaction' clause: you're fine, but you would've been fine not providing the code in retrospect.
(4) If you don't provide source, and the courts don't uphold the 'Remote Network Interaction' clause: you've defeated the GNU Affero GPLv3 in court.
You can absolutely make the argument for or against the business risks of releasing source code, but you can't make the argument for 'uncertainty'.
