Comment by ipaddr
My registrar were different before and after godaddy existed and plenty of varieties existed. I find less exist now than during GoDaddy's heyday. But less people care about domain names as they stopped becoming a lottery ticket.
My worries were paypal would take over but then came stripe.
SSL certificates were from Verisign until letsencrypt offered thek free. I didn't see Cloudflare changing that market.
Before them we had uunet and other backbone providers.
Cloudflare made their name from ddos protection attacks. They made that market.
For DDOS there was and still is Prolexic/Akamai. Cloudflare did not made that market, they just took a big chunk of it. There are other big players too, like Google.