I doubt the system is that simple. No one wrote a rule saying `if url.contains("camel") then block()` it's probably an unintended side-effect
Akamai has been doing precisely that for years & years...
I think you can include advertising/privacy block lists in that vein too, although that allows for the users to locally-correct any issues.
Judging by previous outages it was probably a poorly tested overcomplicated regex which matched to much.