[edent]

Cloudflare claim to do this - https://developers.cloudflare.com/registrar/

> Buy and renew domains through Cloudflare Registrar at cost, without markup fees. You only pay what is charged by registries and ICANN

The problem is, running a registrar is complicated. It costs money. People get angry with you when things break - especially if they've paid you money.

You also have to deal with abuse reports, copyright complaints, and a legal demands. Good luck finding people who want to volunteer for that particular job!

[jsheard]

Cloudflare does sell domains at cost but the catch is that domains registered through them must use CFs nameservers, so they can try to upsell you to their paid services. In that regard they are like most other registrars which treat domains as a loss leader for other products, except they take it to the limit of making nothing on the domains rather than a few cents.

[kortilla]

Having to use cloudflare name servers is a huge drag.