Cloudflare's business model was to protect DDoS "providers"/booters for free, so DDoS became something everyone had to worry about (before cloudflare they tended to DDoS eachother), and then sell the cure.

Krebs wrote some rather scathing posts about them when they were starting up.

Move up a tier or move somewhere where it costs even more. That seems kinda reasonable, really.

CloudFlare uses that Slack Hack Club model?