alt Hacker NewsThat's the whole raison d'etre for CloudFlare, it was originally a DDoS protection layer, which, as the article mentions, is the final form of malicious traffic, being distributed and hard to attribute traffic to an identity.
If you know CloudFlare as anything else, it speaks to how successfully it has grown and marketed itself into other areas.
That's what their marketing tells you it does - not what it actually does.