Can't edit now, but a point to this I'd like to add: 'serve' could absolutely mean best-effort (ie: filtered, moved, null routed, whatever). I don't intend for compulsory weathering-of-the-storm (for the sake of PR), but rather... recognition that this is part and parcel with The Business.

Maybe they/partners couldn't weather the storm. Report on it; Engineering blogs are all the rage. Being a CDN involves more than serving well-traveled bytes, getting paid, or touting how big of a reseller you are. Cat must chase mouse! Krebs is arguably the best customer for this; not e-commerce (can endure the worst outcome - no service) and has domain expertise.

If I enter a protection scheme with someone who - after all - isn't all that tough... why would I/anyone continue? The internet is a big place.