I have access to every building in my city despite only requiring access to one of them, and I didn’t have to request it.
When I visited Seattle, I had to request access (which required clicking a grand total of 5 buttons in an internal portal and was instantly auto approved) to “the Seattle campus” and was granted access to every building, and still have that access years later. It wasn’t temporary.
Ditto for the other offices I’ve visited, both domestic and abroad. One office internationally I literally showed up and walked to reception and said “hi I work here but I’m visiting from out of town” and they immediately gave me access. I don’t see how this is different from the “second passport” described in the article.*
There are a couple of limited-access offices such as for subsidiary companies, but those are not the majority.
* - the one big difference definitely is the amenities and food, though. Amazon offices don’t have great, or even good, food. And the amenities are lame, most offices don’t even have a gym. There isn’t much of a reason to stop by an office unless you’re specifically there to work.