I think they charge you their cost for domains hoping you'll pay for their other services later.
Overall it's been a good experience. Sometimes you have to use CloudFlare rules instead of simpler settings at other registrars.
Can’t even change the name servers, since that’s not configurable with cloudflare.
And I can’t move the domain out of cloudflare so I can change nameservers for 60 days because I just registered the domain…
Support very unhelpful, situation sucks.
CF is great. Their free tier is so good I can't believe people use other clouds for personal/small projects. The integration of products is also seamless: dns/ssl/workers/pages/storage for free!