This is incorrect: https://blog.aboutamazon.eu/discover-whats-behind-the-amazon....
I've worked at two different facilities in CA and never once seen those. We still used the white/yellow/blue badge scheme.
Are there any ambassadors in this thread who know what those are?
Saying someone is a yellow badge badge is saying that they are a full time employee with 5-9 years of tenure, most SDEs don't work with contractors so we don't talk about yellow badge contractors all that often.
If you're interested in this sort of thing, the color is actually supposed to be orange, but the color came out yellow.
TL;DR DSP drivers don't encounter many blue badges.