If Akamai can't provide their service for free, then they shouldn't provide their service for free.
A CDN's whole business is resilience, which in this case makes them the bodyguard, not a bystander.
Whatever your opinion of Cloudflare, it seems clear to me that Matthew Prince keenly understands this, hence him reaching out and offering to step in and get Krebs back online.
tldr; If Akamai can't do the one job they exist to do in the face of an (albeit well armed) assailant, then they're the problem, not Krebs.