Question about scavenger class traffic classification

How do you do it?

Facebook, YouTube, Netflix, and others have dozens, possibly hundreds of IP addresses. It’s unlikely that you could successfully match them based on an IP Access-List.

And most platforms won’t let you match based on FQDN. You pretty much need to run NBAR, which is scarcely supported, especially on edge access devices.

To me this makes the prospect of successfully running a scavenger class dubious.