https://w3techs.com/technologies/overview/proxy, they are tiny compared to CF, their revenue is high because they focus on large enterprise clients.
That does not sound right to me. “20 percent of websites” does not mean “20 percent of traffic.”.
There is no public write-up from Cloudflare that proves “we handle 20% of all Internet traffic.” Cloudflare reports around 295,000 paying customers and more than 30 million Internet properties (20% of the web). So most of their users are on the free plan.
I can't believe they only have 295,000 paying customer, that puts me in a small minority. lol