So, I can’t install aur packages via pacman?
Nope, you have to do it manually or using an helper that abstracts the manual work away.
AUR packages, or to be more precise the PKGBUILD files, are recipes to compile or download stuff outside from the official repositories, manage their deps and installing them on the system.
You should always only run PKGBUILD files that you trust, they can do basically anything on your system. Checking the comments of the package in the aur repo is a good practice too.
Also Are you quoting certain nExT gEn gAmE guy?
…maybe
I’m not sure this is going to directly affect that, because their deal talks mainly about financing for the Control game, and the other news is about movie adaptations, so probably it is going to be another team, lead by the newly re-hired Hector Sanchez, working on that…
But who knows, this kind of things are always hard to follow from the outside