"[The DDoS-for-pay] industry probably would destroy itself without Cloudflare’s protection, and furthermore ... some might perceive a credibility issue with a company that sells DDoS protection services providing safe haven to an entire cottage industry of DDoS-for-hire services."
http://krebsonsecurity.com/2014/02/the-new-normal-200-400-gb...
"[The DDoS-for-pay] industry probably would destroy itself without Cloudflare’s protection, and furthermore ... some might perceive a credibility issue with a company that sells DDoS protection services providing safe haven to an entire cottage industry of DDoS-for-hire services."