See: Azure Front Door, Amazon CloudFront, Google Cloud/Media CDN, Akamai, Fastly, BunnyCDN, and so on.
People are _choosing_ to use Cloudflare, whether that's based on cost, features, or even just brand recognition - but lack of options isn't the case.
Would strongly recommend Lina Khan’s “Amazon’s Antitrust Paradox”
I don't care what AWS offers because there's no way I'm venturing into that for my simple domains.
And CloudFlare went to court. Most companies would not be able to afford it.
Any viable competitor to Cloudflare is going to have to have big coffers, or take on tons of VC debt up front. Even then, it's a race to the bottom on prices.
Seems like they're willing to take anyone as a client
>Researchers and journalists have alleged that many of DDoS-Guard's clients are engaged in criminal activity, and investigative reporter Brian Krebs reported in January 2021 that a "vast number" of the websites hosted by DDoS-Guard are "phishing sites and domains tied to cybercrime services or forums online".[3][1] Some of DDoS-Guard's notable clients have included the Palestinian Islamic militant nationalist movement Hamas, American alt-tech social network Parler, and various groups associated with the Russian state.[3][4][1]
...including piracy sites
>DDoS-Guard provides services for the popular video game piracy website FitGirl Repacks
>Sci-Hub switched from Cloudflare to DDoS-Guard for DDoS protection.