Comment by giantrobot

People use CloudFlare because it's a "free" way for most sites to not get exploited (WAF) or DDoSed (CDN/proxy) regularly. A DDoS can cost quite a bit more than a day of downtime, even just a thundering herd of legitimate users can explode an egress bill.

It sucks there's not more competition in this space but CloudFlare isn't widely used for no reason.

AWS also solves real problems people have. Maintaining infrastructure is expensive as is hardware service and maintenance. Redundancy is even harder and more expensive. You can run a fairly inexpensive and performant system on AWS for years for the cost of a single co-located server.